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

ST CROIX prefixes in area code 340

NANPA records 7 assigned NXX blocks to rate center ST CROIX in area code 340, 12.1% of the 58 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. 5 holders hold those blocks, the largest being T-MOBILE USA, INC. (3), LUMEN TECHNOLGIES ST. CROIX, LLC (1), NEW CINGULAR WIRELESS PCS, LLC - GA (1). The earliest assignment on record here is 2001-08-14 and the most recent 2022-02-18.

7 assigned blocks – 12.1% of 340
5 holders of record
0 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
340-202 LUMEN TECHNOLGIES ST. CROIX, LLC 2018-01-09 no yes
340-206 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2022-02-18 no yes
340-208 T-Mobile T-MOBILE USA, INC. 2021-02-01 no yes
340-226 T-Mobile METROPCS, INC. 2007-07-23 no yes
340-277 T-Mobile T-MOBILE USA, INC. 2001-08-14 no yes
340-332 T-Mobile T-MOBILE USA, INC. 2003-12-16 no yes
340-692 VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE – 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
T-MOBILE USA, INC. T-Mobile 3 42.9%
LUMEN TECHNOLGIES ST. CROIX, LLC – 1 14.3%
NEW CINGULAR WIRELESS PCS, LLC - GA AT&T 1 14.3%
METROPCS, INC. T-Mobile 1 14.3%
VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE – 1 14.3%

Frequently asked

Which prefixes belong to ST CROIX in area code 340?

7 blocks: 202, 206, 208, 226, 277, 332, 692. The table above gives the holder of each.

Which carriers have numbers in ST CROIX?

T-MOBILE USA, INC. (3 blocks), LUMEN TECHNOLGIES ST. CROIX, LLC (1 block), NEW CINGULAR WIRELESS PCS, LLC - GA (1 block), METROPCS, INC. (1 block), VIRGIN ISLANDS TEL. CORP. DBA INNOVATIVE TELEPHONE (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ST CROIX 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 340

All 58 prefixes in 340