MADISON prefixes in area code 203
NANPA records 6 assigned NXX blocks to rate center MADISON in area code 203, 0.8% of the 784 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. 4 holders hold those blocks, the largest being SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (3), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1), PAETEC ITEL, LLC (1). 5 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, 256, 304, 315 – 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 |
|---|---|---|---|---|
| 203-245 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-318 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-350 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | – | yes | yes |
| 203-421 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-779 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 203-896 | Peerless PEERLESS NETWORK OF CONNECTICUT, LLC - CT | – | 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 |
|---|---|---|---|
| SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | AT&T | 3 | 50% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CT | AT&T | 1 | 16.7% |
| PAETEC ITEL, LLC | Windstream | 1 | 16.7% |
| PEERLESS NETWORK OF CONNECTICUT, LLC - CT | Peerless | 1 | 16.7% |
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 MADISON in area code 203?
6 blocks: 245, 318, 350, 421, 779, 896. The table above gives the holder of each.
Which carriers have numbers in MADISON?
SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (1 block), PAETEC ITEL, LLC (1 block), PEERLESS NETWORK OF CONNECTICUT, LLC - CT (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is MADISON 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.