NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2022-01-27 337-727 1XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PINEPRAIRI LA
2022-01-27 337-746 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARLYSS LA
2022-01-27 337-767 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CROWLEY LA
2022-01-27 337-846 0XXX1XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JEANERETTE LA
2022-01-27 343-321 not yet reported which blocks → Iristel Inc. 154E Perth —
2022-01-27 346-547 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2022-01-27 351-229 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E AMESBURY MA
2022-01-27 385-456 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2022-01-27 385-457 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-01-27 385-472 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PROVO UT
2022-01-27 385-563 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SALT LAKE UT
2022-01-27 385-566 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KAYSVILLE UT
2022-01-27 385-865 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OGDEN UT
2022-01-27 401-416 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CUMBLND HL RI
2022-01-27 413-479 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 GREENFIELD MA
2022-01-27 417-503 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E HUMANSVL MO
2022-01-27 425-542 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-27 430-426 1XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEONA TX
2022-01-27 430-466 1XXX3XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CAMPBELL TX
2022-01-27 430-626 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SHIRLEY TX
2022-01-27 430-742 0XXX1XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CAYUGA TX
2022-01-27 430-746 1XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PECAN GAP TX
2022-01-27 435-737 1XXX2XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TOOELE UT
2022-01-27 435-746 0XXX1XXX2XXX3XXX4XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KAMAS UT
2022-01-27 445-236 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2022-01-27 445-248 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2022-01-27 475-548 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MERIDEN CT
2022-01-27 475-644 2XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GEORGETOWN CT
2022-01-27 502-703 0XXX1XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E BLOOMFIELD KY
2022-01-27 505-479 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 SANTA FE NM
2022-01-27 507-812 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E CALEDONIA MN
2022-01-27 531-264 0XXX1XXX2XXX3XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E FIRTH NE
2022-01-27 548-798 not yet reported which blocks → Iristel Inc. 154E Chatham —
2022-01-27 551-343 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2022-01-27 551-344 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 JERSEYCITY NJ
2022-01-27 551-346 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 CLOSTER NJ
2022-01-27 551-347 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2022-01-27 564-229 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2022-01-27 567-737 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TIFFIN OH
2022-01-27 572-209 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F MINCO OK
2022-01-27 581-685 not yet reported which blocks → Iristel Inc. 154E Sept-Iles —
2022-01-27 608-932 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J LA VALLE WI
2022-01-27 631-349 0XXX1XXX2XXX3XXX4XXX which blocks → ONVOY, LLC- NY 384C ORIENT NY
2022-01-27 657-562 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2022-01-27 657-563 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-01-27 659-746 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BESSEMER AL
2022-01-27 667-390 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RANDALLSTN MD
2022-01-27 667-391 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2022-01-27 667-392 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2022-01-27 706-794 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 COLUMBUS GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.