PORTSMOUTH prefixes in area code 603
NANPA records 28 assigned NXX blocks to rate center PORTSMOUTH in area code 603, 3.7% of the 752 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 9 holders hold those blocks, the largest being CONSOLIDATED COMM OF NO. NEW ENGLAND-NH (9), PAETEC ITEL, LLC (4), NEW CINGULAR WIRELESS PCS, LLC - DC (4). The earliest assignment on record here is 2001-10-17 and the most recent 2022-07-21. 19 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 220, 401, 712, 740 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 603-205 | T-Mobile OMNIPOINT MIAMI E LICENSE, LLC | – | yes | yes |
| 603-245 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | no | yes |
| 603-294 | Lumen LEVEL 3 COMMUNICATIONS, LLC - NH | – | yes | yes |
| 603-319 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 603-334 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | yes | yes |
| 603-368 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - NH | 2017-12-27 | yes | yes |
| 603-373 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 603-380 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | yes | yes |
| 603-422 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | yes | yes |
| 603-427 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | yes | yes |
| 603-430 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | no | yes |
| 603-431 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | no | yes |
| 603-433 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | no | yes |
| 603-436 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | no | yes |
| 603-498 | BELL ATLANTIC MOBILE, INC | – | no | yes |
| 603-501 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 603-502 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 603-531 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | yes | yes |
| 603-559 | Consolidated CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | – | no | yes |
| 603-570 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - NH | – | yes | yes |
| 603-610 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 603-766 | FREEDOM RING COMMUNICATIONS, LLC | – | no | yes |
| 603-812 | BELL ATLANTIC MOBILE, INC | – | yes | yes |
| 603-828 | BELL ATLANTIC MOBILE, INC | 2002-01-22 | yes | yes |
| 603-956 | Vonage VONAGE AMERICA LLC | 2022-07-21 | yes | yes |
| 603-957 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2002-01-22 | yes | yes |
| 603-969 | T-Mobile OMNIPOINT MIAMI E LICENSE, LLC | 2002-05-20 | yes | yes |
| 603-988 | T-Mobile OMNIPOINT MIAMI E LICENSE, LLC | 2001-10-17 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| CONSOLIDATED COMM OF NO. NEW ENGLAND-NH | Consolidated | 9 | 32.1% |
| PAETEC ITEL, LLC | Windstream | 4 | 14.3% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 4 | 14.3% |
| OMNIPOINT MIAMI E LICENSE, LLC | T-Mobile | 3 | 10.7% |
| BELL ATLANTIC MOBILE, INC | – | 3 | 10.7% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - NH | AT&T | 2 | 7.1% |
| LEVEL 3 COMMUNICATIONS, LLC - NH | Lumen | 1 | 3.6% |
| FREEDOM RING COMMUNICATIONS, LLC | – | 1 | 3.6% |
| VONAGE AMERICA LLC | Vonage | 1 | 3.6% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to PORTSMOUTH in area code 603?
28 blocks: 205, 245, 294, 319, 334, 368, 373, 380, 422, 427, 430, 431 and 16 more, all listed in the table above.
Which carriers have numbers in PORTSMOUTH?
CONSOLIDATED COMM OF NO. NEW ENGLAND-NH (9 blocks), PAETEC ITEL, LLC (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (4 blocks), OMNIPOINT MIAMI E LICENSE, LLC (3 blocks), BELL ATLANTIC MOBILE, INC (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - NH (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is PORTSMOUTH a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.