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

NEW LONDON prefixes in area code 920

NANPA records 9 assigned NXX blocks to rate center NEW LONDON in area code 920, 1.1% 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. 6 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (4), LEVEL 3 COMMUNICATIONS, LLC - WI (1), AT&T ENTERPRISES, LLC (1). The earliest assignment on record here is 2002-05-13 and the most recent 2003-09-08. 7 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 274, 319, 320, 419 – overlay codes cover the same geography, so a rate center is served by all of them.

9 assigned blocks – 1.1% of 920
6 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
920-249 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
920-250 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
920-359 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – no yes
920-389 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
920-472 Lumen LEVEL 3 COMMUNICATIONS, LLC - WI 2002-05-13 yes yes
920-531 AT&T AT&T ENTERPRISES, LLC 2002-06-07 yes yes
920-538 UNITED STATES CELLULAR - WI – yes yes
920-878 METRO SOUTHWEST PCS, LLP 2003-09-08 yes yes
920-982 AT&T WISCONSIN BELL INC – no 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 4 44.4%
LEVEL 3 COMMUNICATIONS, LLC - WI Lumen 1 11.1%
AT&T ENTERPRISES, LLC AT&T 1 11.1%
UNITED STATES CELLULAR - WI – 1 11.1%
METRO SOUTHWEST PCS, LLP – 1 11.1%
WISCONSIN BELL INC AT&T 1 11.1%

Frequently asked

Which prefixes belong to NEW LONDON in area code 920?

9 blocks: 249, 250, 359, 389, 472, 531, 538, 878, 982. The table above gives the holder of each.

Which carriers have numbers in NEW LONDON?

NEW CINGULAR WIRELESS PCS, LLC - IL (4 blocks), LEVEL 3 COMMUNICATIONS, LLC - WI (1 block), AT&T ENTERPRISES, LLC (1 block), UNITED STATES CELLULAR - WI (1 block), METRO SOUTHWEST PCS, LLP (1 block), WISCONSIN BELL INC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NEW LONDON 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 920

All 785 prefixes in 920