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
2020-10-16 236-508 not yet reported which blocks → Videotron Ltd. 383F Victoria —
2020-10-16 249-387 not yet reported which blocks → Bell Mobility 6574 Peterborough —
2020-10-16 343-209 not yet reported which blocks → Videotron Ltd. 328F Ottawa-Hull —
2020-10-16 438-493 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2020-10-16 469-905 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F MCKINNEY TX
2020-10-16 469-918 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2020-10-16 534-234 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H AUBURNDALE WI
2020-10-16 561-559 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WPALMBEACH FL
2020-10-16 608-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BLANCHADVL WI
2020-10-16 608-500 0XXX5XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H BROOKS WI
2020-10-16 608-900 0XXX1XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CATARACT WI
2020-10-16 639-525 not yet reported which blocks → Bell Mobility 6574 Saskatoon —
2020-10-16 661-545 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DELANO CA
2020-10-16 727-380 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E HUDSON FL
2020-10-16 727-382 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TARPON SPG FL
2020-10-16 727-383 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2020-10-16 909-898 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CHINO CA
2020-10-16 909-901 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2020-10-16 914-398 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OSSINING NY
2020-10-16 916-839 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 RSVL MAIN CA
2020-10-16 956-595 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCALLEN TX
2020-10-15 209-717 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MANTECA CA
2020-10-15 219-271 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D ROLLNGPRRI IN
2020-10-15 226-724 not yet reported which blocks → Bell Mobility 6574 Windsor —
2020-10-15 308-341 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURWELL NE
2020-10-15 308-359 2XXX3XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEAVERCITY NE
2020-10-15 308-361 1XXX3XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDISON NE
2020-10-15 308-400 0XXX1XXX4XXX5XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORD NE
2020-10-15 308-422 2XXX4XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WILSONVL NE
2020-10-15 343-464 not yet reported which blocks → Fibernetics Corporation 464D Almonte —
2020-10-15 343-465 not yet reported which blocks → Fibernetics Corporation 464D Jockvale —
2020-10-15 343-466 not yet reported which blocks → Fibernetics Corporation 464D North Gower —
2020-10-15 343-467 not yet reported which blocks → Fibernetics Corporation 464D Osgoode —
2020-10-15 343-491 not yet reported which blocks → Fibernetics Corporation 464D Carp —
2020-10-15 343-492 not yet reported which blocks → Fibernetics Corporation 464D Constance Bay —
2020-10-15 343-493 not yet reported which blocks → Fibernetics Corporation 464D Pakenham —
2020-10-15 343-895 not yet reported which blocks → Fibernetics Corporation 464D Casselman —
2020-10-15 343-896 not yet reported which blocks → Fibernetics Corporation 464D Merrickville —
2020-10-15 343-897 not yet reported which blocks → Fibernetics Corporation 464D Russell —
2020-10-15 343-898 not yet reported which blocks → Fibernetics Corporation 464D Winchester —
2020-10-15 346-447 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CLEVELAND TX
2020-10-15 385-360 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SALT LAKE UT
2020-10-15 414-285 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILWAUKZN1 WI
2020-10-15 434-554 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E DANVILLE VA
2020-10-15 531-266 0XXX3XXX4XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RUSKIN NE
2020-10-15 571-556 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E BRADDOCK VA
2020-10-15 608-621 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MADISON WI
2020-10-15 619-716 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL CAJON CA
2020-10-15 667-895 0–9 XXXall 10 · 7 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BALTIMORE MD
2020-10-15 681-655 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - WV 449F CHRLSTNZN7 WV

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.