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
2019-03-25 540-802 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MONTVALE VA
2019-03-25 647-421 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 647-422 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 647-423 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 647-594 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 681-216 0–9 XXXall 10 · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 ALLOY WV
2019-03-25 681-292 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J FLAT TOP WV
2019-03-25 743-222 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J GREENSBORO NC
2019-03-25 802-666 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J BURLINGTON VT
2019-03-25 803-598 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F ELLOREE SC
2019-03-25 910-998 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J WILMINGTON NC
2019-03-25 929-523 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2019-03-25 929-524 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2019-03-22 236-956 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2019-03-22 385-303 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-22 438-363 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-03-22 438-442 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-03-22 480-561 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-03-22 585-855 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → TERRA NOVA TELECOM INC. 145J BOLIVAR NY
2019-03-22 585-877 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J ROCHESTER NY
2019-03-22 607-866 6XXX which blocks → TERRA NOVA TELECOM INC. 145J BINGHAMTON NY
2019-03-22 647-653 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-22 650-514 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2019-03-22 667-265 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 VIENNA MD
2019-03-22 769-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CENTREVL MS
2019-03-22 838-900 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J ALBANY NY
2019-03-21 223-900 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J HERSHEY PA
2019-03-21 272-800 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J SCRANTON PA
2019-03-21 346-384 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 APOLLO TX
2019-03-21 364-333 0XXX3XXX5XXX · 3 holders which blocks → CORETEL KENTUCKY, INC. - KY 480F CUSTER KY
2019-03-21 434-468 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CAPRON VA
2019-03-21 445-300 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J PHLDLPHZN1 PA
2019-03-21 470-724 0–9 XXXall 10 · 3 holders which blocks → CORETEL GEORGIA, INC. - GA 052G NEWNAN GA
2019-03-21 470-837 0–9 XXXall 10 · 5 holders which blocks → CORETEL GEORGIA, INC. - GA 052G TALLAPOOSA GA
2019-03-21 502-842 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → CORETEL KENTUCKY, INC. - KY 480F WADDY KY
2019-03-21 504-420 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E VENICE LA
2019-03-21 510-988 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-03-21 602-584 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 623-526 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2019-03-21 657-376 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2019-03-21 814-600 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J ALTOONA PA
2019-03-21 825-987 not yet reported which blocks → TELUS Mobility 8301 Thorhild —
2019-03-20 223-218 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 HENSEL PA
2019-03-20 223-219 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 RAWLINSVL PA
2019-03-20 223-837 0XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 EWATERFORD PA
2019-03-20 223-924 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 FAIRFIELD PA
2019-03-20 332-900 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J NWYRCYZN01 NY
2019-03-20 434-300 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J LYNCHBURG VA
2019-03-20 434-400 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J CHARLOTSVL VA
2019-03-20 437-357 not yet reported which blocks → TELUS Mobility 8303 Toronto —

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.