NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

CHELSEA prefixes in area code 205

NANPA records 6 assigned NXX blocks to rate center CHELSEA in area code 205, 0.8% 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. 4 holders hold those blocks, the largest being PAETEC ITEL, LLC (2), BANDWIDTH.COM CLEC, LLC - AL (2), TELEPORT COMMUNICATIONS AMERICA, LLC - AL (1). The earliest assignment on record here is 2002-07-30 and the most recent 2019-05-09. 6 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 539, 617, 641, 659 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 205
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
205-618 Windstream PAETEC ITEL, LLC – yes yes
205-677 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - AL – yes yes
205-678 AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL – yes yes
205-749 Bandwidth BANDWIDTH.COM CLEC, LLC - AL 2019-05-09 yes yes
205-775 Windstream PAETEC ITEL, LLC 2002-07-30 yes yes
205-831 Bandwidth BANDWIDTH.COM CLEC, LLC - AL 2015-03-31 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

HolderBrandBlocksShare here
PAETEC ITEL, LLC Windstream 2 33.3%
BANDWIDTH.COM CLEC, LLC - AL Bandwidth 2 33.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - AL AT&T 1 16.7%
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL AT&T 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 CHELSEA in area code 205?

6 blocks: 618, 677, 678, 749, 775, 831. The table above gives the holder of each.

Which carriers have numbers in CHELSEA?

PAETEC ITEL, LLC (2 blocks), BANDWIDTH.COM CLEC, LLC - AL (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - AL (1 block), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CHELSEA 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.

Other rate centers in 205

All 785 prefixes in 205