NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-03-29 249-250 not yet reported which blocks → Distributel 082E Massey —
2018-03-29 249-263 not yet reported which blocks → Distributel 082E Missanabie —
2018-03-29 249-264 not yet reported which blocks → Distributel 082E Noelville —
2018-03-29 249-292 not yet reported which blocks → Distributel 082E Oba —
2018-03-29 249-293 not yet reported which blocks → Distributel 082E Ramsay —
2018-03-29 249-788 not yet reported which blocks → Distributel 082E Silverwater —
2018-03-29 249-789 not yet reported which blocks → Distributel 082E Spanish —
2018-03-29 249-790 not yet reported which blocks → Distributel 082E St. Charles —
2018-03-29 249-791 not yet reported which blocks → Distributel 082E Sultan —
2018-03-29 249-792 not yet reported which blocks → Distributel 082E Warren —
2018-03-29 249-793 not yet reported which blocks → Distributel 082E Westree —
2018-03-29 249-794 not yet reported which blocks → Distributel 082E Whitefish —
2018-03-29 249-795 not yet reported which blocks → Distributel 082E Whitefish Falls —
2018-03-29 352-496 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 DUNNELLON FL
2018-03-29 405-490 0XXX1XXX2XXX3XXX4XXX5XXX9XXX which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2018-03-29 442-279 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-03-29 469-462 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
2018-03-29 479-337 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROGERS AR
2018-03-29 623-231 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2018-03-29 657-319 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 FULLERTON CA
2018-03-29 737-233 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ELGIN TX
2018-03-29 908-402 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CRANFORD NJ
2018-03-28 249-243 not yet reported which blocks → Distributel 082E Hawk Junction —
2018-03-28 267-621 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 DOYLESTOWN PA
2018-03-28 302-386 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 REHOBOTH DE
2018-03-28 305-850 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KEYS FL
2018-03-28 365-451 not yet reported which blocks → Distributel 082E Selkirk —
2018-03-28 365-452 not yet reported which blocks → Distributel 082E Vineland —
2018-03-28 365-453 not yet reported which blocks → Distributel 082E Wellandport —
2018-03-28 365-454 not yet reported which blocks → Distributel 082E Welland —
2018-03-28 365-458 not yet reported which blocks → Distributel 082E Ridgeway —
2018-03-28 365-459 not yet reported which blocks → Distributel 082E Stevensville —
2018-03-28 365-460 not yet reported which blocks → Distributel 082E Wainfleet —
2018-03-28 480-408 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2018-03-28 480-504 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2018-03-28 551-260 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2018-03-28 669-229 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2018-03-28 727-274 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 NWPTRICHEY FL
2018-03-28 850-852 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - FL 937C MONTICELLO FL
2018-03-27 223-848 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 YORK PA
2018-03-27 236-767 not yet reported which blocks → TELUS 8086 Winfield —
2018-03-27 236-789 not yet reported which blocks → TELUS 8086 Chetwynd —
2018-03-27 252-989 0XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D ENGELHARD NC
2018-03-27 365-446 not yet reported which blocks → Distributel 082E Cayuga —
2018-03-27 365-447 not yet reported which blocks → Distributel 082E Niagara Falls —
2018-03-27 365-448 not yet reported which blocks → Distributel 082E Niagara-On-The-Lake —
2018-03-27 365-449 not yet reported which blocks → Distributel 082E Pelham —
2018-03-27 365-450 not yet reported which blocks → Distributel 082E Port Robinson —
2018-03-27 365-455 not yet reported which blocks → Distributel 082E Fisherville —
2018-03-27 365-456 not yet reported which blocks → Distributel 082E Fort Erie —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.