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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-02-14 405-852 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 NEWCASTLE OK
2019-02-14 405-903 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 DIBBLE OK
2018-11-05 405-817 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H HARRAH OK
2018-10-31 405-851 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SEMINOLE OK
2018-10-23 405-827 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SHAWNEE OK
2018-09-28 405-766 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2018-09-13 405-803 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H OKLA CITY OK
2018-08-31 405-934 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
2018-06-25 405-894 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STILLWATER OK
2018-06-08 405-906 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDMOND OK
2018-03-29 405-490 0XXX1XXX2XXX3XXX4XXX5XXX9XXX which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2017-12-14 405-992 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D OKLA CITY OK
2017-09-26 405-857 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NORMAN OK
2017-09-26 405-897 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WHEATLAND OK
2017-09-05 405-984 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ARCADIA OK
2017-08-22 405-718 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 NEWALLA OK
2017-08-22 405-988 2XXX3XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 MCLOUD OK
2017-08-03 405-666 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H OKLA CITY OK
2017-08-01 405-746 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SEMINOLE OK
2017-07-20 405-891 0XXX1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TUTTLE OK
2017-07-13 405-920 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 EDMOND OK
2017-07-07 405-704 0–9 XXXall 10 · 4 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 TECUMSEH OK
2017-07-06 405-927 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 PRAGUE OK
2017-06-15 405-724 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2017-06-13 405-450 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 HOLDENVL OK
2017-03-14 405-676 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H MOORE OK
2017-03-13 405-931 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 MIDWEST CY OK
2016-12-14 405-653 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H OKLA CITY OK
2016-10-17 405-493 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OKLA CITY OK
2016-09-01 405-581 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 EARLSBORO OK
2016-08-31 405-480 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2016-08-22 405-776 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EL RENO OK
2016-07-12 405-461 0–9 XXXall 10 · 4 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 ASHER OK
2016-07-12 405-617 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 SHAWNEE OK
2016-06-27 405-847 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C BRITTON OK
2016-06-23 405-451 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F WELLSTON OK
2016-06-22 405-925 0XXX1XXX2XXX3XXX4XXX9XXX · 2 holders which blocks → ONVOY, LLC - OK 409F SPENCER OK
2016-06-17 405-467 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F YUKON OK
2016-06-17 405-937 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F STILLWATER OK
2016-03-08 405-594 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2016-03-04 405-407 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F NOBLE OK
2016-03-03 405-877 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F GUTHRIE OK
2016-02-24 405-832 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C BRITTON OK
2016-02-03 405-554 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H POCASSET OK
2015-12-16 405-591 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H MERIDIAN OK
2015-11-24 405-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2015-10-30 405-654 0–9 XXXall 10 · 6 holders which blocks → CENTRAL CELLULAR L.L.C. DBA COTC CONNECTIONS - OK 094B CHANDLER OK
2015-10-21 405-938 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDMOND OK
2015-10-06 405-845 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2015-09-22 405-438 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 OKLA CITY 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.