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

LEANDER prefixes in area code 512

NANPA records 12 assigned NXX blocks to rate center LEANDER in area code 512, 1.5% 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 SOUTHWESTERN BELL (4), ONVOY, LLC - TX (4), AT&T ENTERPRISES, LLC (1). The earliest assignment on record here is 2006-01-16 and the most recent 2023-07-28. 9 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 737 – overlay codes cover the same geography, so a rate center is served by all of them.

12 assigned blocks – 1.5% of 512
6 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
512-259 AT&T SOUTHWESTERN BELL – no yes
512-260 AT&T SOUTHWESTERN BELL – no yes
512-325 Onvoy ONVOY, LLC - TX 2023-07-28 yes yes
512-337 AT&T AT&T ENTERPRISES, LLC 2006-01-16 yes yes
512-379 AT&T SOUTHWESTERN BELL – yes yes
512-456 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – yes yes
512-528 AT&T SOUTHWESTERN BELL – yes yes
512-616 Onvoy ONVOY, LLC - TX – no yes
512-690 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX – yes yes
512-817 Onvoy ONVOY, LLC - TX 2015-01-05 yes yes
512-881 Onvoy ONVOY, LLC - TX 2022-05-04 yes yes
512-986 T-Mobile T-MOBILE USA, INC. – 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 4 33.3%
ONVOY, LLC - TX Onvoy 4 33.3%
AT&T ENTERPRISES, LLC AT&T 1 8.3%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 1 8.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - TX AT&T 1 8.3%
T-MOBILE USA, INC. T-Mobile 1 8.3%

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 LEANDER in area code 512?

12 blocks: 259, 260, 325, 337, 379, 456, 528, 616, 690, 817, 881, 986. The table above gives the holder of each.

Which carriers have numbers in LEANDER?

SOUTHWESTERN BELL (4 blocks), ONVOY, LLC - TX (4 blocks), AT&T ENTERPRISES, LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - TX (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (1 block), T-MOBILE USA, 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 LEANDER 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 512

All 785 prefixes in 512