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
2019-02-13 386-387 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C PALM COAST FL
2019-02-13 440-553 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ASHTABULA OH
2019-02-13 469-390 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 LEWISVILLE TX
2019-02-13 657-370 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2019-02-13 657-401 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2019-02-13 669-219 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MORGANHILL CA
2019-02-13 856-399 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F ELMER NJ
2019-02-13 872-246 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN06 IL
2019-02-12 206-584 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2019-02-12 226-557 not yet reported which blocks → Fibernetics Corporation 464D Woodstock —
2019-02-12 236-548 not yet reported which blocks → TELUS 8086 Armstrong —
2019-02-12 470-468 0–9 XXXall 10 · 3 holders which blocks → CORETEL GEORGIA, INC. - GA 052G ZEBULON GA
2019-02-12 470-536 0–9 XXXall 10 · 3 holders which blocks → CORETEL GEORGIA, INC. - GA 052G SOCIALCRCL GA
2019-02-12 470-697 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORETEL GEORGIA, INC. - GA 052G LUTHERSVL GA
2019-02-12 470-758 0–9 XXXall 10 · 5 holders which blocks → CORETEL GEORGIA, INC. - GA 052G CUMMING GA
2019-02-12 470-766 0–9 XXXall 10 · 4 holders which blocks → CORETEL GEORGIA, INC. - GA 052G ADAIRSVL GA
2019-02-12 470-842 0–9 XXXall 10 · 4 holders which blocks → CORETEL GEORGIA, INC. - GA 052G ROCKMART GA
2019-02-12 479-360 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTONVL AR
2019-02-12 501-298 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2019-02-12 579-422 not yet reported which blocks → Videotron Ltd. 8306 St-Hippolyte —
2019-02-12 641-362 0–9 XXXall 10 · 8 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F CRESTON IA
2019-02-12 647-593 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-02-12 825-981 not yet reported which blocks → Bell Mobility 6574 Calgary —
2019-02-12 912-500 0–9 XXXall 10 · 6 holders which blocks → CORETEL GEORGIA, INC. - GA 052G BAXLEY GA
2019-02-12 912-758 0–9 XXXall 10 · 3 holders which blocks → CORETEL GEORGIA, INC. - GA 052G LUMBERCITY GA
2019-02-12 959-245 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CT 639C NEWBRITAIN CT
2019-02-11 226-823 not yet reported which blocks → Mornington Communications Co-operative Ltd. 400E Linwood —
2019-02-11 226-824 not yet reported which blocks → Mornington Communications Co-operative Ltd. 400E St. Clements —
2019-02-11 438-339 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-02-11 647-397 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-02-11 765-539 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → MULBERRY COOPERATIVE TELEPHONE COMPANY, INC. - IN 661H ROMNEY IN
2019-02-11 949-504 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2019-02-11 951-481 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2019-02-08 281-505 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 KATY TX
2019-02-08 402-899 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 STROMSBURG NE
2019-02-08 424-422 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MALIBU CA
2019-02-08 450-428 not yet reported which blocks → 9164-3122 Quebec inc 843D St-Pie —
2019-02-08 561-448 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BELLEGLADE FL
2019-02-08 561-453 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BOCA RATON FL
2019-02-08 561-462 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E PAHOKEE FL
2019-02-08 650-501 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PACIFICA CA
2019-02-08 650-502 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2019-02-08 669-269 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SARATOGA CA
2019-02-08 669-270 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MORGANHILL CA
2019-02-08 669-280 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SAN MARTIN CA
2019-02-08 720-715 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DECKERS CO
2019-02-08 856-766 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL NEW JERSEY, INC. - NJ 482F MULLICA HL NJ
2019-02-08 862-758 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORETEL NEW JERSEY, INC. - NJ 482F MT FREEDOM NJ
2019-02-08 862-829 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → CORETEL NEW JERSEY, INC. - NJ 482F MENDHAM NJ
2019-02-08 870-709 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F GURDON AR

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.