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
2018-04-02 249-281 not yet reported which blocks → Distributel 082E Espanola —
2018-04-02 249-283 not yet reported which blocks → Distributel 082E Estaire —
2018-04-02 249-284 not yet reported which blocks → Distributel 082E Garson —
2018-04-02 249-285 not yet reported which blocks → Distributel 082E Gogama —
2018-04-02 424-406 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CMTN CMTN CA
2018-04-02 470-715 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2018-04-02 605-570 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2018-04-02 802-990 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D BURLINGTON VT
2018-03-30 210-728 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SANANTONIO TX
2018-03-30 219-255 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CHESTERTON IN
2018-03-30 313-364 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2018-03-30 612-389 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E TWINCITIES MN
2018-03-30 720-547 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F KEENESBURG CO
2018-03-30 831-202 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALINAS CA
2018-03-30 859-306 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → VONAGE AMERICA LLC 197D WINCHESTER KY
2018-03-30 904-455 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 JACKSONVL FL
2018-03-30 984-231 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E GOLDSTON NC
2018-03-29 249-244 not yet reported which blocks → Distributel 082E Levack —
2018-03-29 249-245 not yet reported which blocks → Distributel 082E Killarney —
2018-03-29 249-246 not yet reported which blocks → Distributel 082E Lively —
2018-03-29 249-247 not yet reported which blocks → Distributel 082E Little Current —
2018-03-29 249-248 not yet reported which blocks → Distributel 082E Markstay —
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 —

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.