NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, last 30 days — NPA 405
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2015-09-18 405-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2015-08-13 405-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2015-07-21 405-968 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2015-06-19 405-477 0–9 XXXall 10 · 5 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 MEEKER OK
2015-06-19 405-955 0–9 XXXall 10 · 4 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 PURCELL OK
2015-06-19 405-963 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 LINDSAY OK
2015-06-11 405-982 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2015-06-02 405-977 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F MOORE OK
2015-05-07 405-544 0–9 XXXall 10 · 4 holders which blocks → WICHITA ONLINE, INC. - OK 258F CHICKASHA OK
2015-04-27 405-915 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWNEE OK
2015-04-23 405-697 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EDMOND OK
2015-03-09 405-965 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2015-03-04 405-855 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 MIDWEST CY OK
2015-03-03 405-985 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2014-10-20 405-252 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
2014-09-04 405-561 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 NORMAN OK
2014-08-25 405-421 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H OKLA CITY OK
2014-05-19 405-531 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EDMOND OK
2014-04-17 405-300 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C MOORE OK
2014-03-03 405-430 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2014-02-06 405-825 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K CHICKASHA OK
2014-02-06 405-939 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K PERKINS OK
2013-07-05 405-276 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OK 409F EL RENO OK
2013-07-05 405-369 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F MINCO OK
2013-07-05 405-578 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OK 409F YUKON OK
2013-07-05 405-731 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F MIDWEST CY OK
2013-06-12 405-402 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2013-06-12 405-835 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2013-05-23 405-404 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2013-04-30 405-339 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2013-04-08 405-696 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EDMOND OK
2013-03-18 405-898 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G OKLA CITY OK
2013-03-07 405-534 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2013-02-19 405-437 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2012-11-13 405-892 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICKASHA OK
2012-09-06 405-693 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2012-08-17 405-479 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 405-546 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 405-673 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-17 405-679 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-08-09 405-403 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-07-06 405-772 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J OKLA CITY OK
2012-06-19 405-667 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-06-05 405-896 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2012-05-15 405-569 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-05-14 405-859 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2012-04-09 405-441 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-04-09 405-541 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-04-09 405-754 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
2012-04-09 405-765 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHAWNEE OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.