ESSEX prefixes in area code 443
NANPA records 14 assigned NXX blocks to rate center ESSEX in area code 443, 1.8% 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. 8 holders hold those blocks, the largest being PAETEC ITEL, LLC (4), TELEPORT COMMUNICATIONS AMERICA, LLC - MD (2), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2). The earliest assignment on record here is 2001-05-11 and the most recent 2001-07-23. 14 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, 573, 667 – 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 |
|---|---|---|---|---|
| 443-231 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | yes | yes |
| 443-460 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 443-505 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MD | – | yes | yes |
| 443-559 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 443-579 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 443-596 | CORE COMMUNICATIONS, INC.- MD | – | yes | yes |
| 443-600 | T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 2001-07-23 | yes | yes |
| 443-648 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MD | – | yes | yes |
| 443-730 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 443-772 | Windstream PAETEC ITEL, LLC | 2001-07-23 | yes | yes |
| 443-777 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-815 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 443-868 | Verizon VERIZON MARYLAND, INC. | – | yes | yes |
| 443-969 | Windstream PAETEC ITEL, LLC | 2001-05-11 | 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 | 4 | 28.6% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - MD | AT&T | 2 | 14.3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 14.3% |
| VERIZON MARYLAND, INC. | Verizon | 2 | 14.3% |
| LEVEL 3 COMMUNICATIONS, LLC - MD | Lumen | 1 | 7.1% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 7.1% |
| CORE COMMUNICATIONS, INC.- MD | – | 1 | 7.1% |
| OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | T-Mobile | 1 | 7.1% |
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 ESSEX in area code 443?
14 blocks: 231, 460, 505, 559, 579, 596, 600, 648, 730, 772, 777, 815 and 2 more, all listed in the table above.
Which carriers have numbers in ESSEX?
PAETEC ITEL, LLC (4 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - MD (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), VERIZON MARYLAND, INC. (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MD (1 block), COMCAST IP PHONE, 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 ESSEX 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.