phone.gd North American phone lookup, short codes, caller signals, and complaint-driven research.

203-603

You are reviewing the Area Code (NPA/NXX) report for 203-603. Did you mean to search the SMS short code 203603?

North American Phone Intelligence

Search a phone number, area code, exchange, or short code

Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.

Examples: 206-739-5800, 206, 206-739, 48369
Raw Number203603
Basic Format203-603
NPA (Area Code)203
NXX603

Call Routing Data

NPA-NXX-XOCNCompanyRate CenterUse TypeCityState
203-603-XXXX9147SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CTNEW HAVENASNEW HAVENCT

Business/Government Phones on the 203-603 Prefix

PhoneNameAddress
203-603-5700Connex Credit Union

Reports

Anonymous User from East Haven, Connecticut

March 13, 2026 at 9:30 PM

203-603-2208 reported as a Robocall. Received on March 13, 2026 at 4:11 PM.

Anonymous User from , CT

September 15, 2025 at 11:05 AM

203-603-4935 reported as a Live Voice or Other. Received on September 15, 2025 at 12:00 AM.

Anonymous User from , CT

February 18, 2025 at 2:44 PM

203-603-2632 reported as a Robocall. Received on January 23, 2025 at 5:18 PM.

Anonymous User from Waterbury, Connecticut

April 14, 2024 at 4:35 PM

203-603-0706 reported as a Robocall. Received on April 10, 2024 at 12:35 PM.
Call for Calls pretending to be government, businesses, or family and friends

Anonymous User from Meriden, Connecticut

May 25, 2023 at 1:49 PM

203-603-1173 reported as a Robocall. Received on May 25, 2023 at 1:44 PM.
Call for Warranties & protection plans

Anonymous User from Hackensack, New Jersey

October 12, 2022 at 11:57 AM

203-603-9903 reported as a Live Voice or Other. Received on October 12, 2022 at 11:55 AM.
Call for Medical & prescriptions

Anonymous User from Danbury, Connecticut

August 31, 2022 at 5:54 PM

203-603-9977 reported as a Live Voice or Other. Received on August 31, 2022 at 3:18 PM.

Anonymous User from Coventry, CT

March 18, 2021 at 4:03 PM

203-603-2481 reported as a Prerecorded Voice. Received on March 18, 2021 at 11:52 AM.
Unwanted call for unknown
Contacted via Wireless (cell phone/other mobile device)

Most 'popular' numbers on this prefix:

203-603-0XXX: 203-603-0700 | 203-603-0703 | 203-603-0706 | 203-603-0726 | 203-603-0737 | 203-603-0783 |
203-603-1XXX: 203-603-1100 | 203-603-1111 | 203-603-1175 | 203-603-1176 | 203-603-1177 |
203-603-2XXX: 203-603-2400 | 203-603-2447 | 203-603-2480 | 203-603-2483 | 203-603-2486 |
203-603-5XXX: 203-603-5200 | 203-603-5220 | 203-603-5222 | 203-603-5229 | 203-603-5700 | 203-603-5701 | 203-603-5703 | 203-603-5707 | 203-603-5750 | 203-603-5753 | 203-603-5757 |
203-603-9XXX: 203-603-9706 | 203-603-9707 | 203-603-9709 | 203-603-9762 | 203-603-9765 | 203-603-9766 | 203-603-9900 | 203-603-9901 | 203-603-9909 | 203-603-9973 | 203-603-9975 | 203-603-9977 | 203-603-9990 | 203-603-9999 |