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
2017-06-21 720-795 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DENVER CO
2017-06-20 218-250 0–9 XXXall 10 · 3 holders which blocks → MIDCONTINENT COMMUNICATIONS - MN 429A LITTLEFORK MN
2017-06-20 234-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H AKRON OH
2017-06-20 240-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H WSHNGTNZN3 MD
2017-06-20 256-285 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - AL 476H HUNTSVILLE AL
2017-06-20 317-680 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SHELBYVL IN
2017-06-20 380-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H COLUMBUS OH
2017-06-20 470-322 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA GA
2017-06-20 507-870 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → MIDCONTINENT COMMUNICATIONS - MN 429A MINNEOTA MN
2017-06-20 567-420 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H TOLEDO OH
2017-06-20 612-274 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2017-06-20 667-266 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H SALISBURY MD
2017-06-20 667-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H BALTIMORE MD
2017-06-20 937-739 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H DAYTON OH
2017-06-16 226-796 not yet reported which blocks → Iristel Inc. 154E Woodstock —
2017-06-16 249-449 not yet reported which blocks → Iristel Inc. 154E Orillia —
2017-06-16 587-864 not yet reported which blocks → TELUS 8084 Calgary —
2017-06-16 628-218 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNFC CNTRL CA
2017-06-16 909-407 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CLAREMONT CA
2017-06-16 936-263 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CONROE TX
2017-06-15 209-268 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F JACKSON CA
2017-06-15 236-304 not yet reported which blocks → Iristel Inc. 154E North Vancouver —
2017-06-15 346-263 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAYTOWN TX
2017-06-15 405-724 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F OKLA CITY OK
2017-06-15 431-806 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2017-06-15 437-700 not yet reported which blocks → Iristel Inc. 154E Toronto —
2017-06-15 438-904 not yet reported which blocks → Bell Mobility 6574 Montreal —
2017-06-15 442-250 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CALEXICO CA
2017-06-15 442-266 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OCSD OCSD CA
2017-06-15 470-474 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D CONYERS GA
2017-06-15 509-862 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SPOKANE WA
2017-06-15 520-849 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2017-06-15 587-909 not yet reported which blocks → Bell Mobility 6574 Calgary —
2017-06-15 647-908 not yet reported which blocks → Bell Mobility 6574 Toronto —
2017-06-15 657-213 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CYPRESS CA
2017-06-15 717-936 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NEWHOLLAND PA
2017-06-15 743-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H GREENSBORO NC
2017-06-15 762-525 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 BLAIRSVL GA
2017-06-15 901-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E COLLIERVL TN
2017-06-15 910-631 0–9 XXXall 10 · 5 holders which blocks → STARVISION, INC. - NC 703H CLINTON NC
2017-06-15 910-800 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H WILMINGTON NC
2017-06-15 970-975 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 MONTROSE CO
2017-06-15 970-981 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → ZIPPYTECH INC. - CO 022J PARACHUTE CO
2017-06-15 980-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H CHARLOTTE NC
2017-06-14 380-200 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CANALWHSTR OH
2017-06-14 551-210 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DUMONT NJ
2017-06-14 581-473 not yet reported which blocks → ISP Telecom Inc. 4727 St-Felicien —
2017-06-14 667-221 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → TELNYX LLC 073H SALISBURY MD
2017-06-14 740-729 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C ASHVILLE OH
2017-06-14 937-400 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C JACKSONCTR OH

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.