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203 Area Code

Area code 203 is in Connecticut (CT), USA and some of the main locations it covers are Bridgeport, New Haven, Stamford, etc. (jump to city list below).

In service since January 01, 1947, area code 203 is the parent Numbering Plan Area in overlay complex 203/475 (overlaying NPAs cover the same area).

The current time for places served by area code 203 is 06:19:01 PM (Eastern Time Zone).

Reverse phone lookup

Map of area code 203

More Connecticut area codes

203 phone number location

NPANXX	Area served¹	Date²
203-200	New Haven	8/14/2008
203-201	New Haven	N/A
203-202	Darien	N/A
203-204	Guilford	N/A
203-205	Danbury	N/A
203-206	Waterbury	N/A
203-207	Danbury	N/A
203-208	Branford	N/A
203-209	Bridgeport	N/A
203-210	Wilton	N/A
203-212	Bridgeport	10/23/2008
203-213	Meriden	N/A
203-214	New Haven	N/A
203-215	New Haven	N/A
203-216	Westport	N/A
203-217	Waterbury	N/A
203-218	Bridgeport	N/A
203-219	Stamford	N/A
203-220	Trumbull	N/A
203-221	Westport	N/A
203-222	Westport	N/A
203-223	Stamford	N/A
203-224	Bridgeport	N/A
203-225	Huntington	N/A
203-226	Westport	N/A
203-227	Westport	N/A
203-228	Waterbury	10/4/2002
203-229	Norwalk	N/A
203-230	New Haven	N/A
203-231	Ansonia/ Derby	N/A
203-232	Waterbury	N/A
203-233	Waterbury	N/A
203-234	New Haven	N/A
203-235	Meriden	N/A
203-236	Waterbury	N/A
203-237	Meriden	N/A
203-238	Meriden	N/A
203-239	New Haven	N/A
203-240	Danbury	N/A
203-241	Danbury	N/A
203-242	Huntington	N/A
203-243	Bridgeport	N/A
203-244	Ridgefield	3/28/2003
203-245	Madison	N/A
203-246	Norwalk	N/A
203-247	Norwalk	N/A
203-248	New Haven	N/A
203-249	Stamford	N/A
203-250	Cheshire	N/A
203-251	Stamford	N/A
203-252	Stamford	N/A
203-253	Stamford	N/A
203-254	Fairfield	N/A
203-255	Fairfield	N/A
203-256	Fairfield	N/A
203-257	Bridgeport	N/A
203-258	Bridgeport	N/A
203-259	Fairfield	N/A
203-260	Bridgeport	N/A
203-261	Trumbull	N/A
203-262	Woodbury	N/A
203-263	Woodbury	N/A
203-264	Woodbury	N/A
203-265	Wallingford	N/A
203-266	Woodbury	N/A
203-267	Woodbury	N/A
203-268	Trumbull	N/A
203-269	Wallingford	N/A
203-270	Newtown	N/A
203-271	Cheshire	N/A
203-272	Cheshire	N/A
203-273	Stamford	10/22/2002
203-274	Stamford	N/A
203-275	Bridgeport	N/A
203-276	Stamford	3/28/2003
203-277	Old Greenwich	4/16/2003
203-278	Ansonia/ Derby	5/1/2001
203-279	Bridgeport	N/A
203-280	Darien	3/24/2004
203-281	New Haven	N/A
203-282	Stamford	N/A
203-283	Milford	N/A
203-284	Wallingford	N/A
203-285	New Haven	N/A
203-286	Norwalk	N/A
203-287	New Haven	N/A
203-288	New Haven	N/A
203-289	Danbury	N/A
203-290	Bridgeport	11/14/2013
203-291	Westport	N/A
203-292	Fairfield	N/A
203-293	Westport	N/A
203-294	Wallingford	N/A
203-295	Norwalk	N/A
203-296	Bridgeport	N/A
203-297	Danbury	N/A
203-298	New Haven	N/A
203-299	Norwalk	N/A

NPANXX	Area served¹	Date²
203-300	Danbury	10/25/2001
203-301	Milford	N/A
203-302	Greenwich	N/A
203-303	Wallingford	N/A
203-304	Newtown	N/A
203-305	Ansonia/ Derby	N/A
203-306	Milford	N/A
203-307	Fairfield	1/31/2005
203-308	Ansonia/ Derby	10/22/2008
203-309	Darien	9/11/2007
203-310	New Canaan	4/16/2003
203-312	Danbury	N/A
203-313	Danbury	N/A
203-314	New Haven	N/A
203-315	Branford	N/A
203-316	Stamford	N/A
203-317	Meriden	N/A
203-318	Madison	N/A
203-319	Fairfield	N/A
203-320	Darien	4/16/2003
203-321	Stamford	N/A
203-322	Stamford	N/A
203-323	Stamford	N/A
203-324	Stamford	N/A
203-325	Stamford	N/A
203-326	Stamford	N/A
203-327	Stamford	N/A
203-328	Stamford	N/A
203-329	Stamford	N/A
203-330	Bridgeport	N/A
203-331	Bridgeport	N/A
203-332	Bridgeport	N/A
203-333	Bridgeport	N/A
203-334	Bridgeport	N/A
203-335	Bridgeport	N/A
203-336	Bridgeport	N/A
203-337	Bridgeport	N/A
203-338	Bridgeport	N/A
203-339	Bridgeport	N/A
203-340	Greenwich	8/19/2003
203-341	Westport	N/A
203-342	Bridgeport	N/A
203-343	Ansonia/ Derby	1/18/2012
203-344	Old Greenwich	N/A
203-345	Bridgeport	N/A
203-346	Waterbury	N/A
203-347	Byram	3/11/2004
203-348	Stamford	N/A
203-349	Westport	N/A
203-350	Madison	N/A
203-351	Stamford	N/A
203-352	Stamford	N/A
203-353	Stamford	N/A
203-354	Norwalk	N/A
203-355	Stamford	N/A
203-356	Stamford	N/A
203-357	Stamford	N/A
203-358	Stamford	N/A
203-359	Stamford	N/A
203-360	Bridgeport	12/10/2008
203-361	New Haven	12/16/2010
203-362	Bridgeport	N/A
203-363	Stamford	N/A
203-364	Newtown	N/A
203-365	Bridgeport	N/A
203-366	Bridgeport	N/A
203-367	Bridgeport	N/A
203-368	Bridgeport	N/A
203-369	Old Greenwich	10/7/2003
203-370	New Haven	N/A
203-371	Bridgeport	N/A
203-372	Bridgeport	N/A
203-373	Bridgeport	N/A
203-374	Bridgeport	N/A
203-375	Bridgeport	N/A
203-376	New Haven	N/A
203-377	Bridgeport	N/A
203-378	Bridgeport	N/A
203-379	Meriden	N/A
203-380	Bridgeport	N/A
203-381	Bridgeport	N/A
203-382	Bridgeport	N/A
203-383	Bridgeport	N/A
203-384	Bridgeport	N/A
203-385	Bridgeport	N/A
203-386	Bridgeport	N/A
203-387	New Haven	N/A
203-388	Stamford	N/A
203-389	New Haven	N/A
203-390	New Haven	11/10/2015
203-391	Stamford	N/A
203-392	New Haven	N/A
203-393	New Haven	N/A
203-394	Bridgeport	N/A
203-395	Bridgeport	N/A
203-396	Bridgeport	N/A
203-397	New Haven	N/A
203-398	Norwalk	N/A
203-399	Stamford	N/A

NPANXX	Area served¹	Date²
203-400	Trumbull	2/19/2002
203-401	New Haven	N/A
203-402	Huntington	N/A
203-403	Ridgefield	N/A
203-404	New Haven	N/A
203-405	Woodbury	4/4/2001
203-406	Stamford	N/A
203-407	New Haven	N/A
203-408	Redding	N/A
203-409	Old Greenwich	N/A
203-410	New Haven	N/A
203-412	New Haven	N/A
203-413	Greenwich	N/A
203-414	Bridgeport	N/A
203-415	New Haven	4/12/2001
203-416	Bridgeport	N/A
203-417	Danbury	N/A
203-418	Fairfield	N/A
203-419	Waterbury	N/A
203-420	Meriden	N/A
203-421	Madison	N/A
203-422	Greenwich	N/A
203-423	Wilton	N/A
203-424	Darien	6/29/2007
203-425	Stamford	N/A
203-426	Newtown	N/A
203-427	Meriden	N/A
203-428	Stamford	N/A
203-429	Westport	N/A
203-430	New Haven	N/A
203-431	Ridgefield	N/A
203-432	New Haven	N/A
203-433	Branford	N/A
203-434	Norwalk	N/A
203-435	New Haven	N/A
203-436	New Haven	N/A
203-437	Waterbury	N/A
203-438	Ridgefield	N/A
203-439	Cheshire	N/A
203-440	Meriden	N/A
203-441	Wolcott	N/A
203-442	New Canaan	N/A
203-443	Meriden	N/A
203-444	New Haven	N/A
203-445	Trumbull	N/A
203-446	Ansonia/ Derby	N/A
203-447	Huntington	N/A
203-448	Danbury	N/A
203-449	Bridgeport	N/A
203-450	Bridgeport	5/12/2008
203-451	Westport	N/A
203-452	Trumbull	N/A
203-453	Guilford	N/A
203-454	Westport	N/A
203-455	Bridgeport	N/A
203-456	Danbury	12/6/2011
203-457	Guilford	N/A
203-458	Guilford	N/A
203-459	Trumbull	N/A
203-460	Danbury	N/A
203-461	Stamford	N/A
203-462	Stamford	N/A
203-463	Seymour	N/A
203-464	New Haven	N/A
203-465	Waterbury	N/A
203-466	New Haven	N/A
203-467	New Haven	N/A
203-468	New Haven	N/A
203-469	New Haven	N/A
203-470	Danbury	N/A
203-477	New Haven	N/A
203-479	New Haven	N/A
203-480	Fairfield	N/A
203-481	Branford	N/A
203-482	Danbury	3/23/2001
203-483	Branford	N/A
203-484	Branford	N/A
203-485	Greenwich	N/A
203-486	Woodbury	N/A
203-487	Stamford	1/3/2001
203-488	Branford	N/A
203-489	Greenwich	5/25/2011
203-490	Naugatuck	N/A
203-491	Newtown	2/12/2010
203-492	New Haven	N/A
203-493	Georgetown	N/A
203-494	New Haven	N/A
203-495	New Haven	N/A
203-496	Greenwich	N/A
203-497	New Haven	N/A
203-498	New Haven	N/A
203-499	New Haven	N/A

NPANXX	Area served¹	Date²
203-500	New Haven	10/25/2001
203-501	Danbury	7/9/2010
203-502	Bridgeport	N/A
203-503	New Haven	N/A
203-504	Stamford	2/12/2004
203-505	Norwalk	N/A
203-506	New Haven	N/A
203-507	New Haven	N/A
203-508	New Haven	2/3/2005
203-509	Waterbury	N/A
203-510	Waterbury	N/A
203-512	Danbury	N/A
203-513	Huntington	N/A
203-514	Meriden	N/A
203-515	Norwalk	N/A
203-516	Ansonia/ Derby	N/A
203-517	Stamford	N/A
203-518	Waterbury	7/2/2001
203-519	Waterbury	2/9/2011
203-520	Bridgeport	5/30/2002
203-521	Bridgeport	N/A
203-522	Bridgeport	N/A
203-523	Norwalk	N/A
203-524	Stamford	N/A
203-525	Waterbury	N/A
203-526	Bridgeport	N/A
203-527	Waterbury	N/A
203-528	Waterbury	N/A
203-529	Wilton	N/A
203-530	New Haven	N/A
203-531	Byram	N/A
203-532	Byram	N/A
203-533	Guilford	N/A
203-534	Bridgeport	N/A
203-535	New Haven	N/A
203-536	Stamford	N/A
203-537	Meriden	N/A
203-538	Huntington	N/A
203-539	Stamford	N/A
203-540	Bridgeport	1/31/2005
203-541	Stamford	N/A
203-542	Greenwich	N/A
203-543	Bridgeport	N/A
203-544	Georgetown	N/A
203-545	Bridgeport	N/A
203-546	Danbury	N/A
203-547	Stamford	N/A
203-548	Stamford	5/30/2002
203-549	Bridgeport	N/A
203-550	Stamford	N/A
203-551	Bridgeport	N/A
203-552	Byram	N/A
203-553	New Haven	N/A
203-554	Stamford	N/A
203-556	Bridgeport	N/A
203-557	Westport	N/A
203-558	Waterbury	N/A
203-559	Darien	N/A
203-560	Waterbury	N/A
203-561	Stamford	N/A
203-562	New Haven	N/A
203-563	Wilton	N/A
203-564	Stamford	N/A
203-565	Waterbury	N/A
203-566	Stamford	2/4/2003
203-567	Huntington	N/A
203-568	Waterbury	N/A
203-569	Stamford	N/A
203-570	Stamford	3/26/2001
203-571	Westport	N/A
203-572	Bridgeport	7/13/2007
203-573	Waterbury	N/A
203-574	Waterbury	N/A
203-575	Waterbury	N/A
203-576	Bridgeport	N/A
203-577	Waterbury	N/A
203-578	Waterbury	N/A
203-579	Bridgeport	N/A
203-580	Byram	10/2/2012
203-581	Bridgeport	N/A
203-582	New Haven	N/A
203-583	Bridgeport	N/A
203-584	New Haven	7/9/2010
203-585	Stamford	N/A
203-586	Woodbury	N/A
203-587	Georgetown	N/A
203-588	Stamford	N/A
203-589	New Haven	N/A
203-590	Trumbull	3/18/2011
203-591	Waterbury	N/A
203-592	Waterbury	N/A
203-593	Norwalk	N/A
203-594	New Canaan	N/A
203-595	Stamford	N/A
203-596	Waterbury	N/A
203-597	Waterbury	N/A
203-598	Waterbury	N/A
203-599	Meriden	N/A

NPANXX	Area served¹	Date²
203-600	Meriden	10/3/2008
203-601	Trumbull	N/A
203-602	Stamford	N/A
203-603	New Haven	N/A
203-604	Norwalk	3/14/2001
203-605	New Haven	N/A
203-606	New Haven	N/A
203-607	Stamford	2/4/2003
203-608	Meriden	N/A
203-609	Stamford	N/A
203-610	Bridgeport	N/A
203-612	Bridgeport	N/A
203-613	Norwalk	N/A
203-614	Stamford	N/A
203-615	Bridgeport	N/A
203-616	Danbury	N/A
203-617	Danbury	9/5/2006
203-618	Greenwich	N/A
203-619	New Haven	N/A
203-620	Darien	7/19/2004
203-621	Darien	N/A
203-622	Greenwich	N/A
203-623	New Haven	N/A
203-624	New Haven	N/A
203-625	Greenwich	N/A
203-626	Wallingford	N/A
203-627	New Haven	N/A
203-628	Danbury	N/A
203-629	Greenwich	N/A
203-630	Meriden	N/A
203-631	Meriden	N/A
203-632	Naugatuck	N/A
203-633	Wolcott	N/A
203-634	Meriden	N/A
203-635	Westport	N/A
203-636	Darien	9/14/2004
203-637	Old Greenwich	N/A
203-638	Trumbull	N/A
203-639	Meriden	N/A
203-640	New Haven	N/A
203-641	New Haven	N/A
203-642	Norwalk	N/A
203-643	Branford	N/A
203-644	Norwalk	N/A
203-645	New Haven	N/A
203-646	Branford	N/A
203-647	Milford	N/A
203-648	Danbury	N/A
203-649	Cheshire	N/A
203-650	Bridgeport	3/26/2001
203-651	Cheshire	N/A
203-652	New Canaan	N/A
203-653	Stamford	N/A
203-654	New Haven	N/A
203-655	Darien	N/A
203-656	Darien	N/A
203-657	New Haven	N/A
203-658	Stamford	N/A
203-659	Fairfield	N/A
203-660	Byram	1/3/2001
203-661	Greenwich	N/A
203-662	Darien	N/A
203-663	Norwalk	N/A
203-664	Redding	N/A
203-665	Wilton	N/A
203-666	Bridgeport	9/26/2013
203-667	Stamford	N/A
203-668	New Haven	N/A
203-669	Darien	N/A
203-670	Fairfield	12/6/2021
203-671	New Haven	N/A
203-672	New Haven	N/A
203-673	Bridgeport	N/A
203-674	Stamford	N/A
203-675	New Haven	N/A
203-676	New Haven	N/A
203-677	Wallingford	N/A
203-678	Wallingford	N/A
203-679	Wallingford	N/A
203-680	New Haven	10/31/2012
203-681	Byram	N/A
203-682	Westport	N/A
203-683	Bridgeport	N/A
203-684	New Haven	10/3/2008
203-685	Bridgeport	3/30/2001
203-686	Meriden	N/A
203-687	New Haven	N/A
203-688	New Haven	N/A
203-689	Guilford	N/A
203-690	Bridgeport	3/21/2008
203-691	New Haven	N/A
203-692	Fairfield	N/A
203-693	Milford	7/13/2010
203-694	Meriden	N/A
203-695	Waterbury	N/A
203-696	Bridgeport	N/A
203-697	Wallingford	N/A
203-698	Old Greenwich	N/A
203-699	Cheshire	N/A

NPANXX	Area served¹	Date²
203-701	Milford	N/A
203-702	Danbury	N/A
203-703	Stamford	N/A
203-704	Wolcott	7/17/2002
203-705	Stamford	N/A
203-706	Waterbury	2/12/2004
203-707	Waterbury	3/10/2011
203-708	Stamford	N/A
203-709	Waterbury	N/A
203-710	New Haven	N/A
203-712	Huntington	N/A
203-713	Milford	N/A
203-714	Naugatuck	N/A
203-715	Meriden	N/A
203-716	New Canaan	N/A
203-717	Greenwich	1/28/2011
203-718	Cheshire	N/A
203-719	Stamford	N/A
203-720	Naugatuck	N/A
203-721	Waterbury	N/A
203-722	Norwalk	N/A
203-723	Naugatuck	N/A
203-724	Stamford	N/A
203-725	Waterbury	N/A
203-726	Bridgeport	9/8/2010
203-727	Bridgeport	6/5/2001
203-728	Stamford	11/22/2006
203-729	Naugatuck	N/A
203-730	Danbury	N/A
203-731	Danbury	N/A
203-732	Ansonia/ Derby	N/A
203-733	Danbury	N/A
203-734	Ansonia/ Derby	N/A
203-735	Ansonia/ Derby	N/A
203-736	Ansonia/ Derby	N/A
203-737	New Haven	N/A
203-738	Guilford	N/A
203-739	Danbury	N/A
203-740	Danbury	N/A
203-741	Wallingford	N/A
203-742	Greenwich	4/10/2003
203-743	Danbury	N/A
203-744	Danbury	N/A
203-745	New Haven	N/A
203-746	Danbury	N/A
203-747	New Haven	N/A
203-748	Danbury	N/A
203-749	Danbury	N/A
203-750	Norwalk	N/A
203-751	Ansonia/ Derby	N/A
203-752	New Haven	N/A
203-753	Waterbury	N/A
203-754	Waterbury	N/A
203-755	Waterbury	N/A
203-756	Waterbury	N/A
203-757	Waterbury	N/A
203-758	Waterbury	N/A
203-759	Waterbury	N/A
203-760	Bridgeport	4/16/2012
203-761	Wilton	N/A
203-762	Wilton	N/A
203-763	Fairfield	N/A
203-764	New Haven	N/A
203-765	New Haven	N/A
203-766	New Haven	N/A
203-767	Bridgeport	N/A
203-768	Waterbury	N/A
203-769	Greenwich	N/A
203-770	Danbury	N/A
203-771	New Haven	N/A
203-772	New Haven	N/A
203-773	New Haven	N/A
203-774	Wallingford	N/A
203-775	Danbury	N/A
203-776	New Haven	N/A
203-777	New Haven	N/A
203-778	Danbury	N/A
203-779	Madison	N/A
203-780	New Haven	10/2/2012
203-781	New Haven	N/A
203-782	New Haven	N/A
203-783	Milford	N/A
203-784	New Haven	N/A
203-785	New Haven	N/A
203-786	New Haven	N/A
203-787	New Haven	N/A
203-788	Danbury	N/A
203-789	New Haven	N/A
203-790	Danbury	N/A
203-791	Danbury	N/A
203-792	Danbury	N/A
203-793	Wallingford	3/23/2001
203-794	Danbury	N/A
203-795	New Haven	N/A
203-796	Danbury	N/A
203-797	Danbury	N/A
203-798	Danbury	N/A
203-799	New Haven	N/A

NPANXX	Area served¹	Date²
203-800	New Haven	3/10/2011
203-801	New Canaan	N/A
203-802	Waterbury	10/3/2008
203-803	Norwalk	N/A
203-804	New Haven	N/A
203-805	Waterbury	N/A
203-806	Cheshire	N/A
203-807	Norwalk	1/30/2001
203-808	Waterbury	5/30/2002
203-809	New Haven	11/4/2002
203-810	Norwalk	7/27/2001
203-812	New Haven	N/A
203-813	Byram	N/A
203-814	Bridgeport	N/A
203-815	New Haven	N/A
203-816	Trumbull	3/14/2001
203-817	Stamford	N/A
203-818	Norwalk	N/A
203-819	Waterbury	N/A
203-820	Norwalk	N/A
203-821	New Haven	N/A
203-822	Norwalk	N/A
203-823	New Haven	N/A
203-824	New Haven	N/A
203-825	Danbury	N/A
203-826	Danbury	N/A
203-827	Old Greenwich	7/19/2004
203-828	Seymour	N/A
203-829	Norwalk	N/A
203-830	Danbury	N/A
203-831	Norwalk	N/A
203-832	Stamford	4/6/2006
203-833	New Haven	7/29/2015
203-834	Wilton	N/A
203-835	Norwalk	N/A
203-836	New Haven	12/6/2011
203-837	Danbury	N/A
203-838	Norwalk	N/A
203-839	Norwalk	N/A
203-840	Norwalk	N/A
203-841	Waterbury	N/A
203-842	Norwalk	N/A
203-843	New Haven	N/A
203-844	Fairfield	8/16/2004
203-845	Norwalk	N/A
203-846	Norwalk	N/A
203-847	Norwalk	N/A
203-848	New Haven	N/A
203-849	Norwalk	N/A
203-850	New Haven	10/3/2008
203-851	Norwalk	N/A
203-852	Norwalk	N/A
203-853	Norwalk	N/A
203-854	Norwalk	N/A
203-855	Norwalk	N/A
203-856	Norwalk	N/A
203-857	Norwalk	N/A
203-858	Norwalk	N/A
203-859	New Haven	N/A
203-861	Greenwich	N/A
203-862	Greenwich	N/A
203-863	Greenwich	N/A
203-864	Bridgeport	3/7/2011
203-865	New Haven	N/A
203-866	Norwalk	N/A
203-867	New Haven	N/A
203-868	New Haven	N/A
203-869	Greenwich	N/A
203-870	Bridgeport	N/A
203-871	Branford	N/A
203-872	Cheshire	N/A
203-873	Bridgeport	2/7/2007
203-874	Milford	N/A
203-875	Darien	N/A
203-876	Milford	N/A
203-877	Milford	N/A
203-878	Milford	N/A
203-879	Wolcott	N/A
203-880	Trumbull	N/A
203-881	Seymour	N/A
203-882	Milford	N/A
203-883	Stamford	N/A
203-884	Guilford	N/A
203-885	Danbury	10/30/2006
203-886	Meriden	N/A
203-887	New Haven	N/A
203-888	Seymour	N/A
203-889	New Haven	N/A
203-890	Stamford	7/27/2001
203-891	New Haven	N/A
203-892	Ansonia/ Derby	11/8/2010
203-893	Ansonia/ Derby	6/29/2007
203-894	Ridgefield	N/A
203-895	Trumbull	N/A
203-896	Madison	N/A
203-897	Stamford	8/20/2008
203-898	Darien	1/31/2005
203-899	Norwalk	N/A

NPANXX	Area served¹	Date²
203-900	Greenwich	2/24/2012
203-901	New Haven	N/A
203-902	New Haven	N/A
203-903	New Haven	N/A
203-904	Norwalk	N/A
203-905	Stamford	N/A
203-906	Ansonia/ Derby	4/23/2002
203-907	New Haven	N/A
203-908	Bridgeport	4/5/2006
203-909	New Haven	5/13/2008
203-910	Waterbury	N/A
203-912	Stamford	N/A
203-913	Bridgeport	N/A
203-914	Stamford	2/24/2012
203-915	New Haven	N/A
203-916	Bridgeport	1/30/2001
203-917	Danbury	10/22/2008
203-918	Stamford	N/A
203-919	Norwalk	N/A
203-920	New Canaan	2/20/2004
203-921	Stamford	N/A
203-922	Huntington	N/A
203-923	Bridgeport	N/A
203-924	Huntington	N/A
203-925	Huntington	N/A
203-926	Huntington	N/A
203-927	New Haven	N/A
203-928	New Haven	N/A
203-929	Huntington	N/A
203-930	Greenwich	3/14/2001
203-931	New Haven	N/A
203-932	New Haven	N/A
203-933	New Haven	N/A
203-934	New Haven	N/A
203-935	Meriden	N/A
203-936	New Haven	9/12/2008
203-937	New Haven	N/A
203-938	Redding	N/A
203-939	Norwalk	6/25/2008
203-940	Stamford	N/A
203-941	Seymour	9/21/2010
203-942	Danbury	N/A
203-943	Norwalk	N/A
203-944	Huntington	N/A
203-945	Norwalk	N/A
203-946	New Haven	N/A
203-947	Danbury	N/A
203-948	Danbury	N/A
203-949	Wallingford	N/A
203-951	Milford	N/A
203-952	Norwalk	N/A
203-953	Bridgeport	7/27/2001
203-954	Ansonia/ Derby	N/A
203-955	Fairfield	2/20/2004
203-956	Norwalk	1/30/2001
203-957	Norwalk	5/25/2011
203-960	Stamford	9/15/2008
203-961	Stamford	N/A
203-962	Stamford	N/A
203-963	Norwalk	N/A
203-964	Stamford	N/A
203-965	Stamford	N/A
203-966	New Canaan	N/A
203-967	Stamford	N/A
203-968	Stamford	N/A
203-969	Stamford	N/A
203-970	Norwalk	4/4/2011
203-971	Greenwich	N/A
203-972	New Canaan	N/A
203-973	Stamford	N/A
203-974	New Haven	N/A
203-975	Stamford	N/A
203-977	Stamford	N/A
203-978	Stamford	N/A
203-979	Stamford	N/A
203-980	New Haven	8/20/2002
203-981	Norwalk	N/A
203-982	Waterbury	N/A
203-983	Greenwich	N/A
203-984	Norwalk	N/A
203-985	New Haven	N/A
203-986	Old Greenwich	2/20/2004
203-987	Greenwich	3/30/2001
203-988	New Haven	N/A
203-989	Stamford	N/A
203-990	Old Greenwich	1/31/2005
203-991	Norwalk	N/A
203-992	Greenwich	5/12/2006
203-993	Bridgeport	7/20/2006
203-994	Danbury	12/14/2001
203-995	Bridgeport	10/8/2008
203-996	New Haven	12/14/2001
203-997	Ansonia/ Derby	5/18/2011
203-998	Stamford	10/15/2004
203-999	New Haven	3/9/2011

For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
Assignment date. N/A - mostly CO codes assigned before 2001.

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Cities in area code 203

City¹	County	Time²
Ansonia	New Haven	E
Beacon Falls	New Haven	E
Bethany	New Haven	E
Bethel	Fairfield	E
Bethlehem	Litchfield	E
Botsford	Fairfield	E
Branford	New Haven	E
Bridgeport	Fairfield	E
Brookfield	Fairfield	E
Cheshire	New Haven	E
Cos Cob	Fairfield	E
Danbury	Fairfield	E
Darien	Fairfield	E
Derby	New Haven	E
East Haven	New Haven	E
Easton	Fairfield	E
Fairfield	Fairfield	E
Georgetown	Fairfield	E
Greens Farms	Fairfield	E
Greenwich	Fairfield	E
Guilford	New Haven	E
Hamden	New Haven	E
Hawleyville	Fairfield	E
Madison	New Haven	E
Meriden	New Haven	E
Middlebury	New Haven	E
Milford	New Haven	E
Monroe	Fairfield	E
Naugatuck	New Haven	E
New Canaan	Fairfield	E
New Fairfield	Fairfield	E
New Haven	New Haven	E
Newtown	Fairfield	E
North Branford	New Haven	E
North Haven	New Haven	E
Northford	New Haven	E
Norwalk	Fairfield	E
Old Greenwich	Fairfield	E
Orange	New Haven	E
Oxford	New Haven	E
Prospect	New Haven	E
Redding	Fairfield	E
Redding Center	Fairfield	E
Redding Ridge	Fairfield	E
Ridgefield	Fairfield	E
Riverside	Fairfield	E
Roxbury	Litchfield	E
Sandy Hook	Fairfield	E
Seymour	New Haven	E
Shelton	Fairfield	E
Sherman	Fairfield	E
South Britain	New Haven	E
Southbury	New Haven	E
Southport	Fairfield	E
Stamford	Fairfield	E
Stevenson	Fairfield	E
Stratford	Fairfield	E
Trumbull	Fairfield	E
Wallingford	New Haven	E
Waterbury	New Haven	E
West Haven	New Haven	E
Weston	Fairfield	E
Westport	Fairfield	E
Wilton	Fairfield	E
Wolcott	New Haven	E
Woodbridge	New Haven	E
Woodbury	Litchfield	E

Listed above are most places served by area code 203. When multiple places in a state/province share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
E stands for Eastern Time Zone (currently 06:19:01 PM).

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203 Area Code

Reverse phone lookup

Map of area code 203

More Connecticut area codes

203 phone number location

203-2XX-XXXX

203-3XX-XXXX

203-4XX-XXXX

203-5XX-XXXX

203-6XX-XXXX

203-9XX-XXXX

Cities in area code 203