NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 713
SOUTHWESTERN BELL 470
SPOK, INC. 62
NEW CINGULAR WIRELESS PCS, LLC - IL 55
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 38
ONVOY, LLC - TX 25
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2026-02-25 713-886 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2025-09-02 713-919 1XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BROOKSHIRE TX
2025-09-02 713-938 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LANGHAMCRK TX
2025-09-02 713-949 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H RICHMNRNBG TX
2025-06-23 713-872 0–9 XXXwhole prefix which blocks → RICE TELECOM CORPORATION 075L HOUSTON TX
2024-04-02 713-912 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H RICHMNRNBG TX
2024-02-21 713-769 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H SPRING TX
2023-10-04 713-282 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEVELAND TX
2023-07-05 713-519 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HSTNSUBURB TX
2023-06-08 713-887 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CYPRESS TX
2023-01-06 713-713 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F HOUSTON TX
2022-07-19 713-832 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2022-07-15 713-925 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HOUSTON TX
2022-06-15 713-281 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 RICHMNRNBG TX
2022-05-04 713-379 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C APOLLO TX
2022-05-04 713-399 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HOUSTON TX
2022-05-04 713-424 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C BAYTOWN TX
2022-04-28 713-347 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2021-11-17 713-810 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H TOMBALL TX
2021-01-04 713-564 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SEABROOK TX
2021-01-04 713-565 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C HUFFMAN TX
2020-12-08 713-930 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2020-08-14 713-913 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BARKER TX
2020-06-19 713-902 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SUGAR LAND TX
2019-02-05 713-903 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C BAYTOWN TX
2018-12-13 713-804 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2017-09-22 713-814 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-01-22 713-597 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2014-01-21 713-325 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2013-08-27 713-766 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HOUSTON TX
2013-08-19 713-380 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2013-05-21 713-352 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F APOLLO TX
2013-05-20 713-322 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2012-09-26 713-815 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2012-01-18 713-998 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX
2011-09-23 713-904 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2011-09-12 713-360 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J HOUSTON TX
2011-09-07 713-997 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2011-08-01 713-239 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2011-05-27 713-714 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
2011-04-14 713-955 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOUSTON TX
2010-12-16 713-836 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2010-11-12 713-909 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 HSTNSUBURB TX
2010-07-19 713-274 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2010-04-05 713-338 0–9 XXXall 10 · 6 holders which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2009-10-22 713-487 0–9 XXXall 10 · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HOUSTON TX
2009-03-16 713-999 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUFFMAN TX
2009-01-20 713-897 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 SPRING TX
2008-12-10 713-485 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2008-11-21 713-489 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.