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

ARROYO prefixes in area code 939

NANPA records 7 assigned NXX blocks to rate center ARROYO in area code 939, 1.9% 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. 3 holders hold those blocks, the largest being SUNCOM DBA T-MOBILE USA (5), LIBERTY MOBILE PUERTO RICO INC. (1), ONVOY SPECTRUM, LLC (1). The earliest assignment on record here is 2001-07-19 and the most recent 2023-11-06. 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 code 787 – overlay codes cover the same geography, so a rate center is served by all of them.

7 assigned blocks – 1.9% of 939
3 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
939-294 T-Mobile SUNCOM DBA T-MOBILE USA 2018-07-30 yes yes
939-307 Liberty LIBERTY MOBILE PUERTO RICO INC. 2001-07-19 yes yes
939-335 T-Mobile SUNCOM DBA T-MOBILE USA 2014-07-18 yes yes
939-370 T-Mobile SUNCOM DBA T-MOBILE USA 2023-05-30 yes yes
939-693 Charter ONVOY SPECTRUM, LLC 2023-11-06 yes yes
939-729 T-Mobile SUNCOM DBA T-MOBILE USA 2021-11-12 yes yes
939-732 T-Mobile SUNCOM DBA T-MOBILE USA 2009-03-18 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
SUNCOM DBA T-MOBILE USA T-Mobile 5 71.4%
LIBERTY MOBILE PUERTO RICO INC. Liberty 1 14.3%
ONVOY SPECTRUM, LLC Charter 1 14.3%

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 ARROYO in area code 939?

7 blocks: 294, 307, 335, 370, 693, 729, 732. The table above gives the holder of each.

Which carriers have numbers in ARROYO?

SUNCOM DBA T-MOBILE USA (5 blocks), LIBERTY MOBILE PUERTO RICO INC. (1 block), ONVOY SPECTRUM, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ARROYO 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