NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-01-31 548-414 not yet reported which blocks → Fibernetics Corporation 464D Bright's Grove —
2022-01-31 548-415 not yet reported which blocks → Fibernetics Corporation 464D Corunna —
2022-01-31 548-416 not yet reported which blocks → Fibernetics Corporation 464D Courtright —
2022-01-31 548-417 not yet reported which blocks → Fibernetics Corporation 464D Oil Springs —
2022-01-31 548-418 not yet reported which blocks → Fibernetics Corporation 464D Petrolia —
2022-01-31 548-419 not yet reported which blocks → Fibernetics Corporation 464D Port Lambton —
2022-01-31 548-420 not yet reported which blocks → Fibernetics Corporation 464D Sombra —
2022-01-31 548-421 not yet reported which blocks → Fibernetics Corporation 464D Watford —
2022-01-31 548-422 not yet reported which blocks → Fibernetics Corporation 464D Wyoming —
2022-01-31 608-816 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA CROSSE WI
2022-01-31 620-581 0XXX7XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BAXTER SPG KS
2022-01-31 762-438 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CORNELIA GA
2022-01-31 762-546 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DALTON GA
2022-01-31 762-684 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COMMERCE GA
2022-01-31 762-784 0XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEXINGTON GA
2022-01-31 774-663 0XXX2XXX3XXX7XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARVER MA
2022-01-31 774-822 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HYANNIS MA
2022-01-31 839-274 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROCK HILL SC
2022-01-31 839-277 0XXX1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILL CREEK SC
2022-01-31 839-868 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J YORK SC
2022-01-31 854-746 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWTONVL SC
2022-01-31 864-927 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAURENS SC
2022-01-31 910-873 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2022-01-31 925-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ECONTRCOST CA
2022-01-28 220-216 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LANCASTER OH
2022-01-28 234-683 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DALTON OH
2022-01-28 252-415 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E EDENTON NC
2022-01-28 321-389 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MELBOURNE FL
2022-01-28 337-722 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LK CHARLES LA
2022-01-28 385-460 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2022-01-28 386-543 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FLAGLERBCH FL
2022-01-28 464-733 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BLUEISLAND IL
2022-01-28 479-503 5XXX which blocks → ONVOY, LLC - AR 348F MAYSVILLE AR
2022-01-28 479-832 0XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOONEVILLE AR
2022-01-28 551-349 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2022-01-28 573-670 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MO
2022-01-28 585-616 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 6 holders which blocks → AT&T - LOCAL 7421 ALBION NY
2022-01-28 667-464 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BALTIMORE MD
2022-01-28 725-883 0XXX1XXX3XXX6XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MESQUITE NV
2022-01-28 743-245 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ADVANCE NC
2022-01-28 763-348 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2022-01-28 771-203 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSHNGTNZN1 DC
2022-01-28 774-637 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SHREWSBURY MA
2022-01-28 774-683 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRIDGEWTR MA
2022-01-28 839-737 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKE WYLIE SC
2022-01-28 848-326 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 TOMS RIVER NJ
2022-01-28 848-426 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DUNELLEN NJ
2022-01-28 856-257 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HADDON HTS NJ
2022-01-28 862-395 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 ORANGE NJ
2022-01-28 862-396 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 POMPTONLKS NJ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.