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
2017-10-02 312-200 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 CHICGOZN01 IL
2017-10-02 618-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C COLLINSVL IL
2017-10-02 646-899 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2017-10-02 646-901 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2017-10-02 647-356 not yet reported which blocks → Bell Mobility 6574 Toronto —
2017-10-02 701-666 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - ND 452F MINTO ND
2017-10-02 765-800 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - IN 097D ALBANY IN
2017-10-02 802-500 0–9 XXXall 10 · 5 holders which blocks → INTEGRATED PATH COMMUNICATIONS-VERMONT LLC - VT 989H BENNINGTON VT
2017-10-02 910-600 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E FAYETTEVL NC
2017-10-02 917-890 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2017-10-02 938-222 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E FLORENCE AL
2017-10-02 938-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E HUNTSVILLE AL
2017-10-02 949-401 0–9 XXXall 10 · 5 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L RNCHOVIEJO CA
2017-09-29 331-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C AURORA IL
2017-09-29 331-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C W CHICAGO IL
2017-09-29 380-333 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C GROVEPORT OH
2017-09-29 380-444 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C COLUMBUS OH
2017-09-29 380-666 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OH 464C GROVE CITY OH
2017-09-29 380-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C GAHANNA OH
2017-09-29 406-900 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MT 9415 ENNIS MT
2017-09-29 470-858 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2017-09-29 513-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C CINCINNATI OH
2017-09-29 539-666 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OK 409F TULSA OK
2017-09-29 563-666 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - IA 221F WALCOTT IA
2017-09-29 571-495 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2017-09-29 574-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2017-09-29 681-484 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 LEWISBURG WV
2017-09-29 682-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
2017-09-29 720-765 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2017-09-29 769-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MS 719E MADISON MS
2017-09-29 931-666 0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - TN 525E CUMBERLDCY TN
2017-09-28 205-600 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2017-09-28 249-353 not yet reported which blocks → TELUS Mobility 8303 Peterborough —
2017-09-28 424-401 0–9 XXXall 10 · 6 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L LOMITA CA
2017-09-28 438-940 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2017-09-28 470-384 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2017-09-28 475-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C NEW HAVEN CT
2017-09-28 501-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F LITTLEROCK AR
2017-09-28 548-996 not yet reported which blocks → TELUS Mobility 8303 Chatham —
2017-09-28 548-997 not yet reported which blocks → TELUS Mobility 8303 Sarnia —
2017-09-28 551-212 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 TEANECK NJ
2017-09-28 571-666 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E WSNGTNZN17 VA
2017-09-28 581-553 not yet reported which blocks → TELUS Quebec 8083 Sainte-Marie-de-Beauce —
2017-09-28 581-993 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2017-09-28 608-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C MADISON WI
2017-09-28 608-708 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 DEERFIELD WI
2017-09-28 608-912 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F DE FOREST WI
2017-09-28 762-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D AUGUSTA GA
2017-09-28 782-232 not yet reported which blocks → TELUS Mobility 8303 Kentville —
2017-09-28 828-690 0XXX1XXX2XXX3XXX6XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ANDREWS NC

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.