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

NRICHLDHLS prefixes in area code 817

NANPA records 33 assigned NXX blocks to rate center NRICHLDHLS in area code 817, 4.2% 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. 13 holders hold those blocks, the largest being SOUTHWESTERN BELL (14), ONVOY, LLC - TX (3), LEVEL 3 COMMUNICATIONS, LLC - TX (3). The earliest assignment on record here is 2001-10-02 and the most recent 2004-12-13. 21 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.

33 assigned blocks – 4.2% of 817
13 holders of record
21 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
817-281 AT&T SOUTHWESTERN BELL – no yes
817-345 AT&T AT&T - LOCAL – yes yes
817-369 GRANDE COMMUNICATIONS NETWORKS, INC. - TX – yes yes
817-393 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
817-398 GRANDE COMMUNICATIONS NETWORKS, INC. - TX – yes yes
817-427 AT&T SOUTHWESTERN BELL – yes yes
817-428 AT&T SOUTHWESTERN BELL – no yes
817-479 Onvoy ONVOY, LLC - TX – yes yes
817-485 AT&T SOUTHWESTERN BELL – no yes
817-498 AT&T SOUTHWESTERN BELL – no yes
817-500 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – yes yes
817-503 AT&T SOUTHWESTERN BELL 2002-06-11 yes yes
817-514 AT&T SOUTHWESTERN BELL – no yes
817-519 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – no yes
817-520 Onvoy ONVOY, LLC - TX – yes yes
817-576 Windstream PAETEC ITEL, LLC 2001-10-02 yes yes
817-577 AT&T SOUTHWESTERN BELL – no yes
817-581 AT&T SOUTHWESTERN BELL – no yes
817-605 AT&T SOUTHWESTERN BELL – no yes
817-656 AT&T SOUTHWESTERN BELL – no yes
817-663 Onvoy ONVOY, LLC - TX – yes yes
817-712 Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX – no yes
817-743 T-Mobile T-MOBILE USA, INC. – yes yes
817-747 Charter ONVOY SPECTRUM, LLC – yes yes
817-766 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – yes yes
817-770 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX – yes yes
817-788 AT&T SOUTHWESTERN BELL – no yes
817-812 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – yes yes
817-830 Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 2004-12-13 yes yes
817-849 AT&T SOUTHWESTERN BELL – yes yes
817-893 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX – yes yes
817-918 T-Mobile METROPCS, INC. – yes yes
817-968 AT&T SOUTHWESTERN BELL – 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 14 42.4%
ONVOY, LLC - TX Onvoy 3 9.1%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 3 9.1%
GRANDE COMMUNICATIONS NETWORKS, INC. - TX – 2 6.1%
LEVEL 3 OF TELECOM OF TEXAS, LLC - TX Lumen 2 6.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - TX AT&T 2 6.1%
AT&T - LOCAL AT&T 1 3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 3%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 3%
PAETEC ITEL, LLC Windstream 1 3%
T-MOBILE USA, INC. T-Mobile 1 3%
ONVOY SPECTRUM, LLC Charter 1 3%
METROPCS, INC. T-Mobile 1 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 NRICHLDHLS in area code 817?

33 blocks: 281, 345, 369, 393, 398, 427, 428, 479, 485, 498, 500, 503 and 21 more, all listed in the table above.

Which carriers have numbers in NRICHLDHLS?

SOUTHWESTERN BELL (14 blocks), ONVOY, LLC - TX (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - TX (3 blocks), GRANDE COMMUNICATIONS NETWORKS, INC. - TX (2 blocks), LEVEL 3 OF TELECOM OF TEXAS, LLC - TX (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is NRICHLDHLS 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