NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-05-01 854-245 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HILTONHEAD SC
2023-05-01 872-335 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2023-05-01 907-506 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS 6563 SEWARD AK
2023-05-01 930-279 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NAPOLEON IN
2023-05-01 943-400 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H CANTON GA
2023-05-01 943-500 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H GRIFFIN GA
2023-05-01 989-527 0XXX5XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LEWISTON MI
2023-05-01 989-586 5XXX which blocks → ONVOY SPECTRUM, LLC 624H MAPLE RPD MI
2023-04-28 346-650 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J VLY LODGE TX
2023-04-28 367-899 not yet reported which blocks → Bell Mobility 6574 Chicoutimi —
2023-04-28 430-326 0XXX1XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FRANKSTON TX
2023-04-28 478-780 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SANDERSVL GA
2023-04-28 782-544 not yet reported which blocks → Bell Mobility Aliant 329A Summerside —
2023-04-28 912-718 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STATESBORO GA
2023-04-27 219-328 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J KOUTS IN
2023-04-27 334-884 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J AUBURN AL
2023-04-27 406-516 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LAUREL MT
2023-04-27 659-269 0–9 XXXall 10 · 4 holders which blocks → CALLWORKS CORPORATION 475J BIRMINGHAM AL
2023-04-27 782-415 not yet reported which blocks → Bell Mobility Aliant 329A Halifax —
2023-04-27 782-557 not yet reported which blocks → Bell Mobility Aliant 329A Charlottetown —
2023-04-27 845-941 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HIGHLAND NY
2023-04-27 938-210 0–9 XXXall 10 · 2 holders which blocks → CALLWORKS CORPORATION 475J HUNTSVILLE AL
2023-04-26 236-784 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2023-04-26 431-953 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2023-04-26 571-637 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2023-04-26 681-467 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J CHRLSTNZN1 WV
2023-04-26 742-615 not yet reported which blocks → Bell Mobility 6574 Brampton —
2023-04-26 762-358 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J AUGUSTA GA
2023-04-26 782-498 not yet reported which blocks → Bell Mobility Aliant 329A Sydney —
2023-04-25 224-495 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHBROOK IL
2023-04-25 253-384 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TACOMA WA
2023-04-25 607-736 0XXX7XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H SHERBURNE NY
2023-04-25 607-781 7XXX which blocks → ONVOY SPECTRUM, LLC 624H WALTON NY
2023-04-25 839-241 0XXX3XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H EUTAWVILLE SC
2023-04-25 839-890 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ORANGEBURG SC
2023-04-25 839-903 0XXX1XXX3XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WHITMIRE SC
2023-04-25 839-930 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H WINNSBORO SC
2023-04-25 854-244 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 6 holders which blocks → NUSO, LLC 732J FLORENCE SC
2023-04-25 854-450 0XXX5XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H JOHNSONVL SC
2023-04-25 854-550 0XXX1XXX2XXX5XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LAKE CITY SC
2023-04-25 854-584 0XXX4XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LAKE VIEW SC
2023-04-25 854-840 0XXX4XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LAMAR SC
2023-04-25 854-845 5XXX7XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LOWCOUNTRY SC
2023-04-25 864-687 0XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H HONEA PATH SC
2023-04-25 864-823 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J GREENVILLE SC
2023-04-25 864-890 0XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H WOODRUFF SC
2023-04-25 864-960 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SIMPSONVL SC
2023-04-25 934-237 0–9 XXXall 10 · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 HUNTINGTON NY
2023-04-24 263-999 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2023-04-24 368-203 not yet reported which blocks → Bell Mobility 6574 Calgary —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.