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
2021-02-01 447-666 0XXX1XXX2XXX4XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H BUCKLEY IL
2021-02-01 447-777 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DANVILLE IL
2021-02-01 447-800 0XXX1XXX2XXX4XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H RANKIN IL
2021-02-01 447-888 0XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H RANTOUL IL
2021-02-01 447-900 0XXX1XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H SIDNEY IL
2021-02-01 447-999 0XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FLATVILLE IL
2021-02-01 458-259 0XXX6XXX · 2 holders which blocks → ALYRICA TELEPHONE LLC DBA NEXT GEN PHONE SYS-OR 9882 BROWNSVL OR
2021-02-01 463-249 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
2021-02-01 479-977 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F FORT SMITH AR
2021-02-01 509-918 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2021-02-01 520-910 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E TUCSON AZ
2021-02-01 573-810 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MO 093F COLUMBIA MO
2021-02-01 573-812 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MO 093F CUBA MO
2021-02-01 573-909 0XXX1XXX2XXX3XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - MO 093F NEWBLOMFLD MO
2021-02-01 650-586 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H PALO ALTO CA
2021-02-01 657-486 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H SILVERADO CA
2021-02-01 660-910 0XXX1XXX4XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F APPLETONCY MO
2021-02-01 774-459 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEWTR MA
2021-02-01 774-474 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MA 892D HARWICH MA
2021-02-01 781-887 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D HANOVER MA
2021-02-01 803-963 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BARNWELL SC
2021-02-01 803-967 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 AIKEN SC
2021-02-01 848-878 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H RED BANK NJ
2021-02-01 850-947 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H SUNNYHILLS FL
2021-02-01 862-358 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NJ 637C ERSKINELKS NJ
2021-02-01 862-462 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C HOPATCONG NJ
2021-02-01 862-832 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C MT VIEW NJ
2021-02-01 862-962 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C VERONA NJ
2021-02-01 904-663 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H YULEE FL
2021-02-01 910-847 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J FAYETTEVL NC
2021-02-01 912-543 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOUGLAS GA
2021-02-01 916-937 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H ELK GROVE CA
2021-02-01 928-403 0XXX1XXX2XXX6XXX7XXX · 3 holders which blocks → TELNYX LLC 073H PEACH SPG AZ
2021-02-01 949-658 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H SADLBK VLY CA
2021-02-01 951-574 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H MURRIETA CA
2021-02-01 970-803 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 LOVELAND CO
2021-01-31 509-883 3XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H WENATCHEE WA
2021-01-29 318-781 2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → ONVOY, LLC - LA 749E ARCADIA LA
2021-01-29 318-810 0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - LA 749E COLFAX LA
2021-01-29 337-547 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEW IBERIA LA
2021-01-29 469-937 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 FORNEY TX
2021-01-29 531-256 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J OMAHA NE
2021-01-29 609-691 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NJ 637C LAMBERTVL NJ
2021-01-29 626-553 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ALHAMBRA CA
2021-01-29 628-277 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H SAN RAFAEL CA
2021-01-29 650-582 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H MT VIEW CA
2021-01-29 657-485 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H HUNTITNBCH CA
2021-01-29 708-739 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2021-01-29 708-742 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C LANSING IL
2021-01-29 708-765 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL

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.