NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 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
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
2023-07-06 774-508 0XXX2XXX3XXX9XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WELLFLEET MA
2023-07-06 816-563 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H KANSASCITY MO
2023-07-06 845-961 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H AMENIA NY
2023-07-06 845-962 0XXX1XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H BARRYVILLE NY
2023-07-06 845-963 0XXX7XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H CALLICOON NY
2023-07-06 845-964 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → PEERING HUB, INC. - NY 818H CHESTER NY
2023-07-06 845-965 0XXX which blocks → PEERING HUB, INC. - NY 818H COLDSPRING NY
2023-07-06 864-853 1XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K PLUMBRANCH SC
2023-07-06 912-404 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H SAVANNAH GA
2023-07-06 985-885 5XXX which blocks → ONVOY SPECTRUM, LLC 624H LOCKPORT LA
2023-07-06 985-895 0XXX1XXX5XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MONTEGUT LA
2023-07-06 985-905 0XXX5XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PIERREPART LA
2023-07-05 309-861 1XXX8XXX9XXX · 2 holders which blocks → CALLWORKS CORPORATION 475J BLOOMINGTN IL
2023-07-05 316-225 0XXX1XXX2XXX6XXX · 4 holders which blocks → ONVOY, LLC - KS 205F ANDALE KS
2023-07-05 447-258 1XXX which blocks → CALLWORKS CORPORATION 475J CHAMPAURBN IL
2023-07-05 479-510 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AR 348F SPRINGDALE AR
2023-07-05 479-512 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AR 348F ROGERS AR
2023-07-05 479-513 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - AR 348F GATEWAY AR
2023-07-05 479-514 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - AR 348F SULPHURSPG AR
2023-07-05 505-575 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ALBUQURQUE NM
2023-07-05 506-628 not yet reported which blocks → Bragg Communications Inc. 4878 Woodstock —
2023-07-05 506-741 not yet reported which blocks → Bell Mobility Aliant 329A Saint John —
2023-07-05 506-952 not yet reported which blocks → Bell Mobility Aliant 329A Moncton —
2023-07-05 517-352 0XXX2XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C BATH MI
2023-07-05 517-354 2XXX which blocks → ONVOY, LLCV - MI 543C LAINGSBURG MI
2023-07-05 517-359 0XXX2XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C STOCKBDG MI
2023-07-05 517-365 0XXX1XXX2XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C WEBBERVL MI
2023-07-05 517-370 0XXX1XXX2XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C MONTGOMERY MI
2023-07-05 603-919 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 ROCHESTER NH
2023-07-05 607-459 2XXX which blocks → ONVOY, LLC- NY 384C FRANKLIN NY
2023-07-05 646-718 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN01 NY
2023-07-05 703-301 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H WSNGTNZN08 VA
2023-07-05 709-963 not yet reported which blocks → Bell Mobility Aliant 329A St. John's —
2023-07-05 713-519 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HSTNSUBURB TX
2023-07-05 718-582 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN15 NY
2023-07-05 718-914 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN06 NY
2023-07-05 740-713 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C MARTISFRRY OH
2023-07-05 740-714 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OH 464C KILBOURNE OH
2023-07-05 740-718 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OH 464C MILLERSPT OH
2023-07-05 754-319 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HOLLYWOOD FL
2023-07-05 757-804 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NRFOLKZON2 VA
2023-07-05 806-837 0XXX6XXX8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LUBBOCK TX
2023-07-05 817-254 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H FORT WORTH TX
2023-07-05 845-954 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC- NY 384C PATTERSON NY
2023-07-05 845-957 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC- NY 384C HAVERSTRAW NY
2023-07-05 862-425 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 HOPATCONG NJ
2023-07-05 904-850 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H JACKSONVL FL
2023-07-05 915-340 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H EL PASO TX
2023-07-05 917-718 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN08 NY
2023-07-05 959-250 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CT 639C MANCHESTER CT

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.