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
2021-01-15 425-364 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BOTHELL WA
2021-01-15 438-260 not yet reported which blocks → Zayo Canada Inc. 8304 Montreal —
2021-01-15 470-910 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2021-01-15 478-346 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E WRIGHTSVL GA
2021-01-15 478-910 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - GA 067D MACON GA
2021-01-15 479-412 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERTON AR
2021-01-15 502-406 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E NEWLIBERTY KY
2021-01-15 571-644 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2021-01-15 579-418 not yet reported which blocks → Fibernetics Corporation 464D Napierville —
2021-01-15 579-419 not yet reported which blocks → Fibernetics Corporation 464D St-Blaise —
2021-01-15 605-736 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BROOKINGS SD
2021-01-15 681-267 0XXX2XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MOOREFIELD WV
2021-01-15 681-274 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F SPENCER WV
2021-01-15 712-561 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COUNCILBLF IA
2021-01-15 727-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLEARWATER FL
2021-01-15 727-966 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H TARPON SPG FL
2021-01-15 762-930 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - GA 067D AUGUSTA GA
2021-01-15 786-966 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H NORTH DADE FL
2021-01-15 863-887 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C BOWLNGGREN FL
2021-01-15 904-659 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C JACKSONVL FL
2021-01-15 912-940 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D SAVANNAH GA
2021-01-15 971-390 0XXX1XXX2XXX4XXX5XXX · 4 holders which blocks → ONVOY, LLC - OR 750E JEWELL OR
2021-01-15 971-391 2XXX5XXX7XXX · 2 holders which blocks → ONVOY, LLC - OR 750E ROCKAWAY OR
2021-01-14 224-369 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2021-01-14 229-497 0XXX1XXX2XXX3XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - GA 067D PARROTT GA
2021-01-14 229-517 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - GA 067D PINEVIEW GA
2021-01-14 229-527 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - GA 067D RHINE GA
2021-01-14 229-547 0XXX1XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC - GA 067D SASSER GA
2021-01-14 240-571 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2021-01-14 331-268 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 SUGARGROVE IL
2021-01-14 361-567 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BRUNI TX
2021-01-14 361-732 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ARANSSPASS TX
2021-01-14 361-789 3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PT COMFORT TX
2021-01-14 361-842 5XXX which blocks → FRACTEL, LLC 965H ARMSTRONG TX
2021-01-14 361-899 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H SAN DIEGO TX
2021-01-14 470-752 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ZEBULON GA
2021-01-14 561-878 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C BELLEGLADE FL
2021-01-14 571-503 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E OCCOQUAN VA
2021-01-14 571-513 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2021-01-14 571-561 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E HAYMARKET VA
2021-01-14 574-369 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ELKHART IN
2021-01-14 579-412 not yet reported which blocks → Fibernetics Corporation 464D Bedford —
2021-01-14 579-413 not yet reported which blocks → Fibernetics Corporation 464D Clarenceville —
2021-01-14 579-414 not yet reported which blocks → Fibernetics Corporation 464D Farnham —
2021-01-14 579-415 not yet reported which blocks → Fibernetics Corporation 464D Hemmingford —
2021-01-14 579-416 not yet reported which blocks → Fibernetics Corporation 464D Henryville —
2021-01-14 579-417 not yet reported which blocks → Fibernetics Corporation 464D Lacolle —
2021-01-14 708-696 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2021-01-14 720-803 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2021-01-14 740-789 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PATASKALA OH

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.