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
2026-09-03 405-908 2XXX which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J OKLA CITY OK
2025-12-22 405-405 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F ALEX OK
2025-03-03 405-244 0–9 XXXwhole prefix which blocks → UNITED STATES CELLULAR - OK 6272 OKLA CITY OK
2025-01-07 405-961 0XXX1XXX2XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PURCELL OK
2023-01-11 405-995 0XXX1XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HOLDENVL OK
2022-09-29 405-363 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2022-09-29 405-978 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2022-05-20 405-967 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2022-02-18 405-991 1XXX3XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K LINDSAY OK
2021-07-13 405-970 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F GUTHRIE OK
2021-07-12 405-960 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 EDMOND OK
2021-07-07 405-994 0XXX4XXX · 2 holders which blocks → ONVOY, LLC - OK 409F BYARS OK
2021-06-17 405-993 0XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F CHOCTAW OK
2021-06-11 405-953 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OKLA CITY OK
2021-06-09 405-723 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BETHANY OK
2021-06-01 405-986 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2021-06-01 405-989 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HOLDENVL OK
2021-05-25 405-957 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J NORMAN OK
2021-05-18 405-956 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2021-05-04 405-497 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J OKLA CITY OK
2021-04-27 405-983 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → TELNYX LLC 073H PAULS VLY OK
2021-03-08 405-870 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OK 409F YUKON OK
2021-03-08 405-873 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F SHAWNEE OK
2021-03-02 405-540 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J OKLA CITY OK
2021-01-20 405-907 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2020-12-31 405-874 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F NOBLE OK
2020-12-31 405-914 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F NORMAN OK
2020-12-10 405-913 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 MOORE OK
2020-10-02 405-981 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2020-09-29 405-876 0–9 XXXall 10 · 3 holders which blocks → AIRESPRING, INC. 996H OKLA CITY OK
2020-09-14 405-916 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2020-08-11 405-864 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → WICHITA ONLINE, INC. - OK 258F CASHION OK
2020-07-01 405-901 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ANADARKO OK
2020-03-10 405-856 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EDMOND OK
2020-03-10 405-868 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2020-02-26 405-860 0XXX1XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F PADEN OK
2020-02-20 405-890 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STELLA OK
2020-02-18 405-846 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TRIBBEY OK
2020-02-11 405-998 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J OKLA CITY OK
2020-01-10 405-871 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H OKLA CITY OK
2019-10-29 405-930 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H OKLA CITY OK
2019-09-06 405-674 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H MUSTANG OK
2019-08-26 405-862 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - OK 6272 OKLA CITY OK
2019-06-21 405-768 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F OKLA CITY OK
2019-06-21 405-866 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PAULS VLY OK
2019-04-09 405-854 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 STILLWATER OK
2019-04-08 405-836 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2019-03-12 405-861 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 EDMOND OK
2019-03-08 405-504 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H MINCO OK
2019-02-14 405-597 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 BLANCHARD 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.