NumberResearch Membership · Data 09/30/2026

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
— 580-735 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 BUFFALO OK
— 580-738 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 HEADRICK OK
— 580-739 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOLLIS OK
— 580-743 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 HUGO OK
— 580-745 0XXX1XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 DURANT OK
— 580-746 not yet reported which blocks → VALLIANT TEL. CO. 2032 MILLERTON OK
— 580-753 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 AMES OK
— 580-754 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 GUYMON OK
— 580-757 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 RYAN OK
— 580-758 0XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 WAUKOMIS OK
— 580-759 0XXX4XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 STRATFORD OK
— 580-761 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 PONCA CITY OK
— 580-762 not yet reported which blocks → SOUTHWESTERN BELL 9533 PONCA CITY OK
— 580-763 none assigned yet which blocks → SOUTHWESTERN BELL 9533 PONCA CITY OK
— 580-764 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 CHESTER OK
— 580-765 not yet reported which blocks → SOUTHWESTERN BELL 9533 PONCA CITY OK
— 580-766 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 FORTSUPPLY OK
— 580-767 not yet reported which blocks → SOUTHWESTERN BELL 9533 PONCA CITY OK
— 580-771 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LAWTON OK
— 580-772 8XXX which blocks → SOUTHWESTERN BELL 9533 WEATHERFD OK
— 580-774 none assigned yet which blocks → SOUTHWESTERN BELL 9533 WEATHERFD OK
— 580-775 6XXX9XXX · 2 holders which blocks → UNITED STATES CELLULAR - OK 6272 DURANT OK
— 580-776 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 MENO OK
— 580-777 1XXX7XXX8XXX · 3 holders which blocks → MID-AMERICA TEL., INC. 2010 FITTSTOWN OK
— 580-778 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 TURPIN OK
— 580-779 2XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 HELENA OK
— 580-782 4XXX6XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 MANGUM OK
— 580-788 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 ELMORECITY OK
— 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

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.