NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-08-27 548-358 not yet reported which blocks → Fibernetics Corporation 464D Chesley —
2021-08-27 548-359 not yet reported which blocks → Fibernetics Corporation 464D Feversham —
2021-08-27 548-360 not yet reported which blocks → Fibernetics Corporation 464D Flesherton —
2021-08-27 548-361 not yet reported which blocks → Fibernetics Corporation 464D Hanover —
2021-08-27 548-362 not yet reported which blocks → Fibernetics Corporation 464D Hepworth —
2021-08-27 548-363 not yet reported which blocks → Fibernetics Corporation 464D Markdale —
2021-08-27 548-364 not yet reported which blocks → Fibernetics Corporation 464D Meaford —
2021-08-27 548-365 not yet reported which blocks → Fibernetics Corporation 464D Sauble Beach —
2021-08-27 548-366 not yet reported which blocks → Fibernetics Corporation 464D Southampton —
2021-08-27 548-367 not yet reported which blocks → Fibernetics Corporation 464D Tara —
2021-08-27 548-368 not yet reported which blocks → Fibernetics Corporation 464D Thornbury —
2021-08-27 548-369 not yet reported which blocks → Fibernetics Corporation 464D Wiarton —
2021-08-27 551-326 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2021-08-27 551-327 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2021-08-27 573-601 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 KENNETT MO
2021-08-27 612-468 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2021-08-27 848-313 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 NEWBRNSWCK NJ
2021-08-27 854-210 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 BEAUFORT SC
2021-08-27 985-343 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PARADIS LA
2021-08-26 229-550 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 MOULTRIE GA
2021-08-26 231-379 0XXX1XXX2XXX7XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E ONEKAMA MI
2021-08-26 314-861 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2021-08-26 314-906 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2021-08-26 352-725 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 WEEKICHSPG FL
2021-08-26 424-458 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E REDONDO CA
2021-08-26 470-841 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 CUMMING GA
2021-08-26 548-273 not yet reported which blocks → Fibernetics Corporation 464D Delhi —
2021-08-26 548-274 not yet reported which blocks → Fibernetics Corporation 464D Jarvis —
2021-08-26 548-275 not yet reported which blocks → Fibernetics Corporation 464D Langton —
2021-08-26 548-276 not yet reported which blocks → Fibernetics Corporation 464D Port Dover —
2021-08-26 548-277 not yet reported which blocks → Fibernetics Corporation 464D Port Rowan —
2021-08-26 548-278 not yet reported which blocks → Fibernetics Corporation 464D Waterford —
2021-08-26 564-225 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F OLYMPIA WA
2021-08-26 571-567 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WSNGTNZN19 VA
2021-08-26 580-557 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TONKAWA OK
2021-08-26 582-203 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 STATECOLLG PA
2021-08-26 586-316 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2021-08-26 667-334 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2021-08-26 667-335 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2021-08-26 785-609 1XXX which blocks → GIANT COMMUNICATIONS, INC. - KS 5237 DENISON KS
2021-08-26 786-819 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORTH DADE FL
2021-08-26 804-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHARLES CY VA
2021-08-26 863-339 0–9 XXXall 10 · 8 holders which blocks → METROPCS NETWORKS, LLC 899D MULBERRY FL
2021-08-26 912-560 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 HINESVILLE GA
2021-08-26 970-841 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F CRAIG CO
2021-08-26 971-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLACKAMAS OR
2021-08-26 971-667 0XXX2XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H GOVENTCAMP OR
2021-08-26 984-291 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CHAPELHILL NC
2021-08-26 986-206 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - ID 192F NAMPA ID
2021-08-25 225-846 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GONZALES LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.