NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-09-28 325-297 1XXX2XXX4XXX5XXX6XXX7XXX which blocks → NUSO, LLC 478J SAN ANGELO TX
2021-09-28 325-298 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J ABILENE TX
2021-09-28 346-512 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F CHANNELVW TX
2021-09-28 385-430 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-09-28 409-271 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J BEAUMONT TX
2021-09-28 515-524 4XXX6XXX9XXX · 3 holders which blocks → PREMIER COMMUNICATIONS, INC. - IA 904D WEBSTER CY IA
2021-09-28 629-260 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F WHITEBLUFF TN
2021-09-28 639-461 not yet reported which blocks → SaskTel Mobility 9868 Plenty —
2021-09-28 639-462 not yet reported which blocks → SaskTel Mobility 9868 Canoe Narrows —
2021-09-28 639-463 not yet reported which blocks → SaskTel Mobility 9868 Climax —
2021-09-28 639-464 not yet reported which blocks → SaskTel Mobility 9868 Pelican Narrows —
2021-09-28 639-465 not yet reported which blocks → SaskTel Mobility 9868 Consul —
2021-09-28 639-482 not yet reported which blocks → SaskTel Mobility 9868 Kincaid —
2021-09-28 639-483 not yet reported which blocks → SaskTel Mobility 9868 Eyebrow —
2021-09-28 639-485 not yet reported which blocks → SaskTel Mobility 9868 Cumberland House —
2021-09-28 639-486 not yet reported which blocks → SaskTel Mobility 9868 Glaslyn —
2021-09-28 639-487 not yet reported which blocks → SaskTel Mobility 9868 Sandy Bay —
2021-09-28 639-545 not yet reported which blocks → SaskTel Mobility 9868 Vanguard —
2021-09-28 639-546 not yet reported which blocks → SaskTel Mobility 9868 Rhein —
2021-09-28 639-547 not yet reported which blocks → SaskTel Mobility 9868 Coderre —
2021-09-28 639-830 not yet reported which blocks → SaskTel Mobility 9868 Hodgeville —
2021-09-28 639-831 not yet reported which blocks → SaskTel Mobility 9868 Val Marie —
2021-09-28 660-317 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 SEDALIA MO
2021-09-28 681-380 2XXX3XXX4XXX9XXX · 3 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F PHILIPPI WV
2021-09-28 689-259 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2021-09-28 725-772 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LAS VEGAS NV
2021-09-28 727-416 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TARPON SPG FL
2021-09-28 772-254 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H STUART FL
2021-09-28 772-255 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H SEBASTIAN FL
2021-09-28 772-256 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H JENSEN BCH FL
2021-09-28 806-804 1XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → NUSO, LLC 478J AMARILLO TX
2021-09-28 806-809 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → NUSO, LLC 478J LUBBOCK TX
2021-09-28 915-289 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J EL PASO TX
2021-09-28 928-461 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 478J TUBA CITY AZ
2021-09-28 940-319 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 478J WICHITAFLS TX
2021-09-28 954-820 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H POMPANOBCH FL
2021-09-28 954-902 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H DEERFLDBCH FL
2021-09-28 956-643 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J BROWNSVL TX
2021-09-28 970-813 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F BAYFIELD CO
2021-09-28 979-344 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 478J BRYAN TX
2021-09-27 202-936 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2021-09-27 206-756 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2021-09-27 213-584 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 04 CA
2021-09-27 234-328 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J YOUNGSTOWN OH
2021-09-27 234-533 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → FRACTEL, LLC 965H HINCKLEY OH
2021-09-27 236-448 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2021-09-27 239-374 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 IMMOKALEE FL
2021-09-27 260-289 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J FORT WAYNE IN
2021-09-27 316-398 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 NEWTON KS
2021-09-27 320-577 5XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 FORESTON MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.