COLUMBIA prefixes in area code 443
NANPA records 31 assigned NXX blocks to rate center COLUMBIA in area code 443, 3.9% 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. 12 holders hold those blocks, the largest being PAETEC ITEL, LLC (7), VERIZON MARYLAND, INC. (6), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (5). The earliest assignment on record here is 2001-01-15 and the most recent 2018-11-19. 28 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 207, 223, 235, 252 – 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 |
|---|---|---|---|---|
| 443-259 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-276 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 443-283 | Windstream PAETEC ITEL, LLC | – | no | yes |
| 443-285 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-319 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 443-367 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-393 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 443-430 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2001-05-18 | yes | yes |
| 443-472 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 443-518 | Verizon VERIZON MARYLAND, INC. | 2008-12-16 | yes | yes |
| 443-535 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-537 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | yes | yes |
| 443-538 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2001-06-20 | no | yes |
| 443-539 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 443-542 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 443-545 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | 2001-05-18 | yes | yes |
| 443-546 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-583 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 443-656 | Windstream PAETEC ITEL, LLC | 2001-05-10 | yes | yes |
| 443-718 | Windstream PAETEC ITEL, LLC | 2008-03-05 | yes | yes |
| 443-741 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 2011-03-29 | yes | yes |
| 443-745 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | no | yes |
| 443-766 | Windstream PAETEC ITEL, LLC | 2005-05-18 | yes | yes |
| 443-774 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2018-11-19 | yes | yes |
| 443-812 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2001-01-15 | yes | yes |
| 443-832 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 443-864 | T-Mobile METROPCS, INC. | 2001-12-19 | yes | yes |
| 443-878 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | – | yes | yes |
| 443-896 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | yes | yes |
| 443-917 | Onvoy ONVOY, LLC - MD | 2011-10-07 | yes | yes |
| 443-979 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 2011-11-21 | 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 |
|---|---|---|---|
| PAETEC ITEL, LLC | Windstream | 7 | 22.6% |
| VERIZON MARYLAND, INC. | Verizon | 6 | 19.4% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | Verizon | 5 | 16.1% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | Lumen | 4 | 12.9% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 6.5% |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | T-Mobile | 1 | 3.2% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 3.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | Verizon | 1 | 3.2% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 1 | 3.2% |
| METROPCS, INC. | T-Mobile | 1 | 3.2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | AT&T | 1 | 3.2% |
| ONVOY, LLC - MD | Onvoy | 1 | 3.2% |
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 COLUMBIA in area code 443?
31 blocks: 259, 276, 283, 285, 319, 367, 393, 430, 472, 518, 535, 537 and 19 more, all listed in the table above.
Which carriers have numbers in COLUMBIA?
PAETEC ITEL, LLC (7 blocks), VERIZON MARYLAND, INC. (6 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - MD (4 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is COLUMBIA 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.