WESTMINSTR prefixes in area code 443
NANPA records 15 assigned NXX blocks to rate center WESTMINSTR in area code 443, 1.9% of the 785 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (4), NEW CINGULAR WIRELESS PCS, LLC - DC (2), LEVEL 3 COMMUNICATIONS, LLC - MD (2). The earliest assignment on record here is 2009-05-07 and the most recent 2011-09-07. 12 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 351, 410, 419, 567 – 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 |
|---|---|---|---|---|
| 443-201 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | yes | yes |
| 443-241 | Onvoy ONVOY, LLC - MD | – | no | yes |
| 443-244 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 443-289 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 2011-05-16 | yes | yes |
| 443-293 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | yes | yes |
| 443-340 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 443-368 | CORE COMMUNICATIONS, INC.- MD | – | no | yes |
| 443-487 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 443-536 | T-Mobile METROPCS, INC. | – | yes | yes |
| 443-547 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2009-05-07 | yes | yes |
| 443-605 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 443-789 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | yes | yes |
| 443-821 | T-Mobile METROPCS, INC. | 2010-07-13 | yes | yes |
| 443-952 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2011-09-07 | yes | yes |
| 443-974 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | 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 |
|---|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | Verizon | 4 | 26.7% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 2 | 13.3% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | Lumen | 2 | 13.3% |
| METROPCS, INC. | T-Mobile | 2 | 13.3% |
| ONVOY, LLC - MD | Onvoy | 1 | 6.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | Verizon | 1 | 6.7% |
| CORE COMMUNICATIONS, INC.- MD | – | 1 | 6.7% |
| PAETEC ITEL, LLC | Windstream | 1 | 6.7% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | AT&T | 1 | 6.7% |
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 WESTMINSTR in area code 443?
15 blocks: 201, 241, 244, 289, 293, 340, 368, 487, 536, 547, 605, 789 and 3 more, all listed in the table above.
Which carriers have numbers in WESTMINSTR?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MD (2 blocks), METROPCS, INC. (2 blocks), ONVOY, LLC - MD (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is WESTMINSTR 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.