Recent prefix assignments

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

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
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
— 580-846 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 LONE WOLF OK
— 580-847 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 BENNINGTON OK
— 580-849 1XXX which blocks → KANOKLA TEL ASSN 1788 SOCALDWELL OK
— 580-850 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARDMORE OK
— 580-852 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 HELENA OK
— 580-854 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 TYRONE OK
— 580-855 4XXX5XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 CARRIER OK
— 580-856 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 RATLIFF CY OK
— 580-857 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 ALLEN OK
— 580-862 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 DOUGLAS OK
— 580-863 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 GARBER OK
— 580-864 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 COVINGTON OK
— 580-866 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 SHARON OK
— 580-868 1XXX6XXX8XXX · 3 holders which blocks → MID-AMERICA TEL., INC. 2010 HENNEPIN OK
— 580-870 not yet reported which blocks → OK
— 580-871 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 DACOMA OK
— 580-873 0XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 FORTTOWSON OK
— 580-874 0XXX3XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 KREMLIN OK
— 580-875 0XXX5XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 WALTERS OK
— 580-876 not yet reported which blocks → VALLIANT TEL. CO. 2032 RUFE OK
— 580-877 0XXX1XXX2XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 SOUTHMEADE OK
— 580-883 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 RINGWOOD OK
— 580-885 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 ARNETT OK
— 580-886 none assigned yet which blocks → PIONEER TEL. COOP., INC. 2018 CANTON OK
— 580-887 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 FAY OK
— 580-888 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 HARDESTY OK
— 580-889 none assigned yet which blocks → SOUTHWESTERN BELL 9533 ATOKA OK
— 580-891 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 OAKWOOD OK
— 580-892 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 GERTY OK
— 580-894 not yet reported which blocks → KANOKLA TEL ASSN 1788 SOUTHHAVEN OK
— 580-895 0XXX3XXX which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H KONAWA OK
— 580-896 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OK 409F COALGATE OK
— 580-897 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
— 580-898 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C DURANT OK
— 580-903 not yet reported which blocks → OK
— 580-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 580-916 8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DURANT OK
— 580-918 not yet reported which blocks → OK
— 580-920 none assigned yet which blocks → SOUTHWESTERN BELL 9533 DURANT OK
— 580-921 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 LAVERNE OK
— 580-922 none assigned yet which blocks → PIONEER TEL. COOP., INC. 2018 SEILING OK
— 580-923 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 GAGE OK
— 580-924 not yet reported which blocks → SOUTHWESTERN BELL 9533 DURANT OK
— 580-925 0XXX5XXX6XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 KONAWA OK
— 580-926 not yet reported which blocks → DOBSON TEL. CO. 1988 CAMARGO OK
— 580-927 4XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 COALGATE OK
— 580-928 0XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 SAYRE OK
— 580-931 4XXX5XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DURANT OK
— 580-933 none assigned yet which blocks → VALLIANT TEL. CO. 2032 VALLIANT OK
— 580-934 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 GATE OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.