NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 580-795 none assigned yet which blocks → SOUTHWESTERN BELL 9533 MADILL OK
— 580-796 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 LAHOMA OK
— 580-806 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H KINGSTON OK
— 580-807 4XXX8XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H MARLOW OK
— 580-808 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → ONVOY, LLC - OK 409F WOODWARD OK
— 580-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 580-816 0XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WEATHERFD OK
— 580-818 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ARDMORE OK
— 580-819 8XXX which blocks → SOUTHWESTERN BELL 9533 WEATHERFD OK
— 580-821 7XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ELK CITY OK
— 580-822 none assigned yet which blocks → PIONEER TEL. COOP., INC. 2018 OKEENE OK
— 580-824 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 WAYNOKA OK
— 580-825 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F HITCHCOCK OK
— 580-829 none assigned yet which blocks → KANOKLA TEL ASSN 1788 CAPRON OK
— 580-832 0XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CORDELL OK
— 580-833 0XXX1XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F BLACKWELL OK
— 580-835 not yet reported which blocks → PINE TEL. CO. 2017 EAGLETOWN OK
— 580-836 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 CONNERVL OK
— 580-837 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 LOGAN OK
— 580-838 not yet reported which blocks → CHEROKEE TEL. CO. 1979 KEMP OK
— 580-839 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 NASH OK
— 580-845 2XXX3XXX5XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 TUPELO OK
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.