NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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
2020-03-27 213-398 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2020-03-27 213-420 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MONTEBELLO CA
2020-03-27 213-655 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 01 CA
2020-03-27 343-571 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2020-03-27 343-572 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2020-03-27 417-701 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E HARTVILLE MO
2020-03-27 423-640 6XXX7XXX8XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 SNEEDVILLE TN
2020-03-27 475-267 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2020-03-27 534-777 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H VESPER WI
2020-03-27 539-866 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J OILTON OK
2020-03-27 657-567 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SANTA ANA CA
2020-03-27 661-561 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C DELANO CA
2020-03-27 715-390 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WI 225C COLBY WI
2020-03-27 715-400 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WI 225C ATHENS WI
2020-03-27 715-710 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - WI 225C EDGAR WI
2020-03-27 719-319 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - CO 026D CREEDE CO
2020-03-27 720-702 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CO 026D KEENESBURG CO
2020-03-27 726-600 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SANANTONIO TX
2020-03-27 803-966 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H COLUMBIA SC
2020-03-27 825-669 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-03-27 831-529 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SANTA CRUZ CA
2020-03-27 839-200 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WHITMIRE SC
2020-03-27 839-222 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BATH SC
2020-03-27 839-300 0XXX1XXX3XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H SHAWAFBHTS SC
2020-03-27 839-333 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SUMTER SC
2020-03-27 839-444 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H EHRHARDT SC
2020-03-27 839-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AIKEN SC
2020-03-27 839-529 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BAMBERG SC
2020-03-27 839-600 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HOLLY HILL SC
2020-03-27 839-666 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ESTILL SC
2020-03-27 839-777 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H EDGEFIELD SC
2020-03-27 839-800 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NEWELLENTN SC
2020-03-27 839-888 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DENMARK SC
2020-03-27 839-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H JOHNSTON SC
2020-03-27 839-999 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CHPNLTLMTN SC
2020-03-27 858-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DEL MAR CA
2020-03-27 915-666 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CANUTILLO TX
2020-03-27 949-569 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2020-03-26 206-561 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2020-03-26 206-627 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2020-03-26 325-222 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SAN ANGELO TX
2020-03-26 332-232 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN01 NY
2020-03-26 346-424 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SATSUMA TX
2020-03-26 346-425 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2020-03-26 360-206 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-03-26 407-819 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 ORLANDO FL
2020-03-26 425-331 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2020-03-26 469-797 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2020-03-26 502-586 0–9 XXXall 10 · 2 holders which blocks → INTRADO COMMUNICATIONS, LLC 861C LOUISVILLE KY
2020-03-26 619-679 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.