NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 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 21
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
2020-12-01 940-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H DENTON TX
2020-11-30 209-798 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J STOCKTON CA
2020-11-30 409-336 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H JASPER TX
2020-11-30 430-356 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ALBA TX
2020-11-30 442-342 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J PALM SPG CA
2020-11-30 469-924 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2020-11-30 602-960 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-11-30 682-340 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2020-11-30 682-899 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ALVARADO TX
2020-11-30 682-966 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H CLEBURNE TX
2020-11-30 682-977 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H AZLE TX
2020-11-30 689-226 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D KISSIMMEE FL
2020-11-30 830-699 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DEL RIO TX
2020-11-30 830-799 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H RUNGE TX
2020-11-30 915-933 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CANUTILLO TX
2020-11-30 915-944 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H FT HANCOCK TX
2020-11-30 940-348 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H ALVORD TX
2020-11-30 940-786 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BOYD TX
2020-11-30 980-341 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E KINGS MT NC
2020-11-30 980-342 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E LINCOLNTON NC
2020-11-27 224-799 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORTHBROOK IL
2020-11-27 260-278 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FORT WAYNE IN
2020-11-27 346-799 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CLEVELAND TX
2020-11-27 386-434 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C PIERSON FL
2020-11-27 442-341 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-11-27 548-570 not yet reported which blocks → Fibernetics Corporation 464D Blyth —
2020-11-27 548-571 not yet reported which blocks → Fibernetics Corporation 464D Brussels —
2020-11-27 548-572 not yet reported which blocks → Fibernetics Corporation 464D Hensall —
2020-11-27 548-573 not yet reported which blocks → Fibernetics Corporation 464D Lucknow —
2020-11-27 548-574 not yet reported which blocks → Fibernetics Corporation 464D Seaforth —
2020-11-27 548-575 not yet reported which blocks → Fibernetics Corporation 464D Wingham —
2020-11-27 603-457 0–9 XXXall 10 · 4 holders which blocks → IDT AMERICA, CORP. - NH 314C DOVER NH
2020-11-27 609-769 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MOUNTHOLLY NJ
2020-11-27 619-879 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-11-27 682-339 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J KELLER TX
2020-11-27 726-400 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SANANTONIO TX
2020-11-27 737-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BASTROP TX
2020-11-27 737-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AUSTIN TX
2020-11-27 747-303 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AGOURA CA
2020-11-27 772-276 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C HOBE SOUND FL
2020-11-27 870-876 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - AR 348F JESUP AR
2020-11-27 941-559 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C PUNTAGORDA FL
2020-11-27 945-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H GRANDPRARI TX
2020-11-27 945-348 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FRISCO TX
2020-11-27 945-356 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DLFTWTARPT TX
2020-11-27 945-465 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H COMBINE TX
2020-11-27 945-529 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H VENUS TX
2020-11-27 945-600 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H CELINA TX
2020-11-27 949-601 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SADLBK VLY CA
2020-11-27 949-603 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SADLBK VLY CA

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.