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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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-01-06 854-242 2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - SC 548E KINGSTREE SC
2021-01-06 854-254 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E WALTERBORO SC
2021-01-06 854-504 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - SC 548E NMYRTLEBCH SC
2021-01-06 864-691 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E LYMAN SC
2021-01-06 864-692 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E FOUNTANINN SC
2021-01-06 864-693 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - SC 548E CLINTON SC
2021-01-06 864-694 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - SC 548E PACOLET SC
2021-01-06 864-737 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - SC 548E BLACKSBURG SC
2021-01-06 864-738 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SC 548E JONESVILLE SC
2021-01-06 864-739 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - SC 548E COWPENS SC
2021-01-06 864-750 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - SC 548E SALEM SC
2021-01-06 864-780 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E CLEMSON SC
2021-01-06 864-818 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SC 548E TRAVESREST SC
2021-01-06 906-444 4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ROCK MI
2021-01-06 906-999 0XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C IRON RIVER MI
2021-01-06 930-231 0XXX1XXX2XXX3XXX7XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F JASONVILLE IN
2021-01-06 984-271 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E FRANKLINTN NC
2021-01-05 365-637 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2021-01-05 367-320 not yet reported which blocks → Bell Mobility 6574 Quebec —
2021-01-05 470-671 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E SOCIALCRCL GA
2021-01-05 470-741 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E LULA GA
2021-01-05 586-278 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERLINE MI
2021-01-05 734-889 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C NEW BOSTON MI
2021-01-05 762-267 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E HAMILTON GA
2021-01-05 762-270 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E MCCAYSVL GA
2021-01-05 825-478 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2021-01-05 947-244 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ORTONVILLE MI
2021-01-04 210-953 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2021-01-04 213-932 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LSAN DA 14 CA
2021-01-04 224-822 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ARLIGTNHTS IL
2021-01-04 254-427 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C LAGUNA PK TX
2021-01-04 279-667 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SCRM NORTH CA
2021-01-04 281-699 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C CROSBY TX
2021-01-04 331-299 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HINSDALE IL
2021-01-04 331-500 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GENEVA IL
2021-01-04 341-500 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ELSBR-PINL CA
2021-01-04 346-633 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C DEER PARK TX
2021-01-04 346-640 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H LANGHAMCRK TX
2021-01-04 380-234 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COLUMBUS OH
2021-01-04 424-667 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LOMITA CA
2021-01-04 437-284 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-01-04 437-638 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-01-04 438-417 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-01-04 438-564 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-01-04 469-928 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2021-01-04 516-898 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN08 NY
2021-01-04 615-314 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 GOODLETSVL TN
2021-01-04 657-788 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SILVERADO CA
2021-01-04 713-564 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SEABROOK TX
2021-01-04 713-565 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C HUFFMAN TX

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.