Phone Prefix
(603) 503-XXXX
NH • LANCASTER
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Carrier Information
NANPA
State
NH
Region
NE
Rate Center
LANCASTER
Assigned To
BELL ATLANTIC MOBILE, INC
OCN
6386
Status
AS
Date Assigned
Oct 04, 2022
Number Range
First Number
(603) 503-0000
Last Number
(603) 503-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
4 reports
4
Total FCC + FTC DNC complaints for numbers in this prefix
Top 3 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (603) 503-4953 6035034953 | 2 |
| 2 | (603) 503-3522 6035033522 | 1 |
| 3 | (603) 503-3538 6035033538 | 1 |
About This Prefix
Phone numbers starting with (603) 503 are part of the North American Numbering Plan (NANP). The first three digits (603) represent the Area Code (NPA), and the next three digits (503) represent the Central Office Code (NXX) or exchange.
- NPA (603) - Numbering Plan Area, identifies the geographic region
- NXX (503) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)