NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2022-12-15 434-314 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANVILLE VA
2022-12-15 480-934 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2022-12-15 520-540 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-12-15 539-359 0XXX1XXX2XXX3XXX5XXX · 4 holders which blocks → ONVOY, LLC - OK 409F NOWATA OK
2022-12-15 539-390 0XXX1XXX2XXX3XXX8XXX · 2 holders which blocks → ONVOY, LLC - OK 409F MULDROW OK
2022-12-15 561-915 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DELRAY BCH FL
2022-12-15 573-902 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PERRYVILLE MO
2022-12-15 602-613 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2022-12-15 641-250 0XXX1XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MANLY IA
2022-12-15 641-254 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 NASHUA IA
2022-12-15 712-394 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BELOIT IA
2022-12-15 743-774 0XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC - NC 638E SOUTHMONT NC
2022-12-15 753-754 not yet reported which blocks → Fibernetics Corporation 464D Bath —
2022-12-15 753-755 not yet reported which blocks → Fibernetics Corporation 464D Gananoque —
2022-12-15 753-756 not yet reported which blocks → Fibernetics Corporation 464D Kingston —
2022-12-15 753-757 not yet reported which blocks → Fibernetics Corporation 464D Napanee —
2022-12-15 753-758 not yet reported which blocks → Fibernetics Corporation 464D Deseronto —
2022-12-15 753-759 not yet reported which blocks → Fibernetics Corporation 464D Inverary —
2022-12-15 865-565 0XXX1XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - TN 525E RUTLEDGE TN
2022-12-15 941-440 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H PTCHARLOTT FL
2022-12-15 943-234 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D MONROE GA
2022-12-15 945-283 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2022-12-15 980-490 0XXX1XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E NEW LONDON NC
2022-12-15 980-789 0XXX1XXX8XXX · 2 holders which blocks → ONVOY, LLC - NC 638E GOOSECREEK NC
2022-12-14 220-243 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ATHENS OH
2022-12-14 321-469 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 COCOA FL
2022-12-14 464-208 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2022-12-14 531-306 0XXX1XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 MURRAY NE
2022-12-14 602-342 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2022-12-14 712-391 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ANTHON IA
2022-12-14 754-298 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLLYWOOD FL
2022-12-14 826-213 0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 SPOTSYLVAN VA
2022-12-14 828-601 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HICKORY NC
2022-12-14 948-205 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 NWPTNWSZN2 VA
2022-12-13 249-403 not yet reported which blocks → Fibernetics Corporation 464D Bracebridge —
2022-12-13 249-420 not yet reported which blocks → Fibernetics Corporation 464D Gravenhurst —
2022-12-13 260-699 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J FORT WAYNE IN
2022-12-13 314-417 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E LADUE MO
2022-12-13 321-416 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COCOA FL
2022-12-13 346-609 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2022-12-13 346-612 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEVELAND TX
2022-12-13 352-767 1XXX2XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ASTOR FL
2022-12-13 368-645 not yet reported which blocks → TELUS Mobility 8301 Fort McMurray —
2022-12-13 386-358 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FLAGLERBCH FL
2022-12-13 431-368 not yet reported which blocks → Fibernetics Corporation 464D Stonewall —
2022-12-13 561-918 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BOCA RATON FL
2022-12-13 606-290 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CORBIN KY
2022-12-13 689-288 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KISSIMMEE FL
2022-12-13 719-697 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 MONTEVISTA CO
2022-12-13 727-428 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E NWPTRICHEY FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.