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

SAN GERMAN prefixes in area code 939

NANPA records 6 assigned NXX blocks to rate center SAN GERMAN in area code 939, 1.7% of the 359 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. 1 holder holds those blocks, the largest being SUNCOM DBA T-MOBILE USA (6). The earliest assignment on record here is 2010-01-06 and the most recent 2022-11-28. 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 code 787 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1.7% of 939
1 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
939-228 T-Mobile SUNCOM DBA T-MOBILE USA 2010-01-06 yes yes
939-344 T-Mobile SUNCOM DBA T-MOBILE USA 2018-04-09 yes yes
939-347 T-Mobile SUNCOM DBA T-MOBILE USA 2022-08-25 yes yes
939-352 T-Mobile SUNCOM DBA T-MOBILE USA 2022-11-28 yes yes
939-525 T-Mobile SUNCOM DBA T-MOBILE USA 2016-04-26 yes yes
939-608 T-Mobile SUNCOM DBA T-MOBILE USA 2021-12-10 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.

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 SAN GERMAN in area code 939?

6 blocks: 228, 344, 347, 352, 525, 608. The table above gives the holder of each.

Which carriers have numbers in SAN GERMAN?

SUNCOM DBA T-MOBILE USA (6 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SAN GERMAN 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 939

All 359 prefixes in 939