NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 26
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
2022-10-17 367-990 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2022-10-17 404-342 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA GA
2022-10-17 425-554 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-10-17 437-442 not yet reported which blocks → Fibernetics Corporation 464D Toronto —
2022-10-17 445-298 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHLDLPHZN2 PA
2022-10-17 516-940 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN03 NY
2022-10-17 548-755 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Simcoe —
2022-10-17 562-635 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DOWNEY CA
2022-10-17 580-489 0XXX1XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C FORTTOWSON OK
2022-10-17 580-780 7XXX8XXX9XXX · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C BENNINGTON OK
2022-10-17 615-899 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GALLATIN TN
2022-10-17 629-282 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F MURFREESBO TN
2022-10-17 672-971 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2022-10-17 680-253 0XXX1XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H FAIR HAVEN NY
2022-10-17 680-257 0XXX which blocks → PEERING HUB, INC. - NY 818H HANNIBAL NY
2022-10-17 680-258 0XXX1XXX · 2 holders which blocks → PEERING HUB, INC. - NY 818H JORDAN NY
2022-10-17 680-259 0XXX which blocks → PEERING HUB, INC. - NY 818H KNOXBORO NY
2022-10-17 680-261 0–9 XXXall 10 · 2 holders which blocks → PEERING HUB, INC. - NY 818H LYONS NY
2022-10-17 689-284 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E ORLANDO FL
2022-10-17 737-349 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2022-10-17 807-317 not yet reported which blocks → Distributel 082E Thunder Bay —
2022-10-17 870-965 0XXX1XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K CASH AR
2022-10-17 909-819 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E UPLAND CA
2022-10-17 929-656 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN03 NY
2022-10-14 256-983 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2022-10-14 326-207 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H DAYTON OH
2022-10-14 331-292 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H DOWNERSGRV IL
2022-10-14 343-226 not yet reported which blocks → ISP Telecom Inc. 4727 Russell —
2022-10-14 343-318 not yet reported which blocks → ISP Telecom Inc. 4727 Pakenham —
2022-10-14 343-412 not yet reported which blocks → ISP Telecom Inc. 4727 Rockland —
2022-10-14 346-596 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H HUMBLE TX
2022-10-14 346-597 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LANGHAMCRK TX
2022-10-14 346-598 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H TOMBALL TX
2022-10-14 380-255 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NEW ALBANY OH
2022-10-14 682-396 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ARLINGTON TX
2022-10-14 682-397 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NRICHLDHLS TX
2022-10-14 727-613 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H STPETERSBG FL
2022-10-14 737-347 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K BASTROP TX
2022-10-14 763-358 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2022-10-14 872-321 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CHICGOZN05 IL
2022-10-14 872-322 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H CHICGOZN06 IL
2022-10-14 904-869 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H JACKSONVL FL
2022-10-14 929-652 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN06 NY
2022-10-14 929-653 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN08 NY
2022-10-14 929-654 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NWYRCYZN12 NY
2022-10-13 225-498 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BATONROUGE LA
2022-10-13 252-660 0XXX1XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 FARMVILLE NC
2022-10-13 321-462 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MELBOURNE FL
2022-10-13 438-860 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2022-10-13 445-262 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.