NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-11-16 856-463 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J BLACKWOOD NJ
2020-11-16 873-671 not yet reported which blocks → Fibernetics Corporation 464D Chelsea —
2020-11-16 873-672 not yet reported which blocks → Fibernetics Corporation 464D Maniwaki —
2020-11-16 908-457 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2020-11-13 202-978 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2020-11-13 217-981 0XXX1XXX2XXX6XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 VIRDEN IL
2020-11-13 341-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CROCKETT CA
2020-11-13 346-646 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2020-11-13 352-738 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E GROVELAND FL
2020-11-13 442-335 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-11-13 442-338 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-11-13 530-835 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C NOSAN JUAN CA
2020-11-13 530-935 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C GEORGETOWN CA
2020-11-13 562-517 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2020-11-13 579-676 not yet reported which blocks → Fibernetics Corporation 464D St-Cesaire —
2020-11-13 579-677 not yet reported which blocks → Fibernetics Corporation 464D Sutton —
2020-11-13 579-678 not yet reported which blocks → Fibernetics Corporation 464D Waterloo —
2020-11-13 609-973 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 ALLENTOWN NJ
2020-11-13 609-995 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 OCEAN CITY NJ
2020-11-13 612-682 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2020-11-13 626-944 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ALHAMBRA CA
2020-11-13 626-989 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PSDN PSDN CA
2020-11-13 669-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LOS GATOS CA
2020-11-13 925-744 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WALNUT CRK CA
2020-11-13 952-395 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2020-11-12 209-793 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MERCED CA
2020-11-12 254-952 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C KILLEEN TX
2020-11-12 262-254 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C OCONOMOWOC WI
2020-11-12 272-252 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F LORDS VLY PA
2020-11-12 505-442 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2020-11-12 573-617 0XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SULLIVAN MO
2020-11-12 573-661 0XXX1XXX2XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 BOWLNGGREN MO
2020-11-12 579-674 not yet reported which blocks → Fibernetics Corporation 464D Bromont —
2020-11-12 579-675 not yet reported which blocks → Fibernetics Corporation 464D Dunham —
2020-11-12 605-657 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - SD 162G WATERTOWN SD
2020-11-12 619-834 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-11-12 619-875 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-11-12 802-217 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VT 451F ST JOHNSBY VT
2020-11-12 805-812 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMARILLO CA
2020-11-12 838-227 0–9 XXXall 10 · 7 holders which blocks → HD CARRIER LLC 321J CENTRALBDG NY
2020-11-12 862-727 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C BOONTON NJ
2020-11-12 984-800 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H RALEIGH NC
2020-11-11 206-677 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2020-11-11 207-601 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEWISTON ME
2020-11-11 316-374 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 GODDARD KS
2020-11-11 434-427 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E EMPORIA VA
2020-11-11 442-683 2XXX6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J HOMESTDVLY CA
2020-11-11 479-405 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROGERS AR
2020-11-11 484-828 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 CATASAUQUA PA
2020-11-11 607-401 8XXX9XXX which blocks → HD CARRIER LLC 321J BINGHAMTON NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.