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

GRANBURY prefixes in area code 817

NANPA records 14 assigned NXX blocks to rate center GRANBURY in area code 817, 1.8% of the 781 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 SOUTHWESTERN BELL (5), NEW CINGULAR WIRELESS PCS, LLC - IL (3), T-MOBILE USA, INC. (2). The earliest assignment on record here is 2001-03-23 and the most recent 2005-11-10. 10 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 682 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 1.8% of 817
6 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
817-219 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – no yes
817-243 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
817-279 AT&T SOUTHWESTERN BELL – yes yes
817-408 AT&T SOUTHWESTERN BELL – yes yes
817-559 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2001-03-23 yes yes
817-573 AT&T SOUTHWESTERN BELL – no yes
817-578 AT&T SOUTHWESTERN BELL – yes yes
817-579 AT&T SOUTHWESTERN BELL – no yes
817-650 T-Mobile T-MOBILE USA, INC. – yes yes
817-736 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – yes yes
817-776 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX 2002-03-28 yes yes
817-780 MATRIX TELECOM, LLC. S/I/I TNCI - TX – no yes
817-894 T-Mobile T-MOBILE USA, INC. 2001-08-23 yes yes
817-964 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2005-11-10 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.

Who holds the blocks

HolderBrandBlocksShare here
SOUTHWESTERN BELL AT&T 5 35.7%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 3 21.4%
T-MOBILE USA, INC. T-Mobile 2 14.3%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 2 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX Verizon 1 7.1%
MATRIX TELECOM, LLC. S/I/I TNCI - TX – 1 7.1%

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 GRANBURY in area code 817?

14 blocks: 219, 243, 279, 408, 559, 573, 578, 579, 650, 736, 776, 780 and 2 more, all listed in the table above.

Which carriers have numbers in GRANBURY?

SOUTHWESTERN BELL (5 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (3 blocks), T-MOBILE USA, INC. (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - TX (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (1 block), MATRIX TELECOM, LLC. S/I/I TNCI - TX (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GRANBURY 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 817

All 781 prefixes in 817