NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2012-05-09 770-580 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2012-05-08 385-290 0–9 XXXall 10 · 5 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D SALT LAKE UT
2012-05-08 385-312 0–9 XXXall 10 · 3 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2012-05-08 507-502 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MN 184D NO CHESTER MN
2012-05-08 520-277 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E WHITLOW AZ
2012-05-08 520-353 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - AZ 630E BISBEE AZ
2012-05-08 605-519 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 RAPID CITY SD
2012-05-08 616-449 0–9 XXXall 10 · 5 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J FREEPORT MI
2012-05-08 865-315 0–9 XXXall 10 · 3 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 KNOXVILLE TN
2012-05-08 970-751 not yet reported which blocks → UNION TELEPHONE COMPANY 013B DELTA CO
2012-05-08 970-770 not yet reported which blocks → UNION TELEPHONE COMPANY 013B MONTROSE CO
2012-05-07 269-336 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAWYER MI
2012-05-07 602-832 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2012-05-07 681-260 0–9 XXXall 10 · 5 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 MARTINSBG WV
2012-05-07 681-323 0–9 XXXall 10 · 4 holders which blocks → CITIZENS TEL CO OF WV DBA FRONTIER OF WV 0270 BLUEFIELD WV
2012-05-07 681-622 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER WEST VIRGINIA INC. 9214 CLARKSBURG WV
2012-05-07 701-713 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND 6568 WILLISTON ND
2012-05-07 760-338 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CALIFORNCY CA
2012-05-07 917-962 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN03 NY
2012-05-05 234-209 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NO CANTON OH
2012-05-04 226-494 not yet reported which blocks → ISP Telecom Inc. 4727 Chatham —
2012-05-04 510-340 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-05-04 705-470 not yet reported which blocks → Bragg Communications Inc. 4878 Sudbury —
2012-05-04 807-456 not yet reported which blocks → TELUS Mobility 8303 Kenora —
2012-05-04 867-688 not yet reported which blocks → TELUS Mobility 8303 Yellowknife —
2012-05-04 867-689 not yet reported which blocks → TELUS Mobility 8303 Whitehorse —
2012-05-03 509-424 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 YAKIMA WA
2012-05-03 623-299 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2012-05-03 763-217 0–9 XXXwhole prefix which blocks → WIRELESS COMMUNICATIONS VENTURE 4609 BIG LAKE MN
2012-05-02 204-520 not yet reported which blocks → TELUS Integrated Communications 2782 Brandon —
2012-05-02 204-521 not yet reported which blocks → TELUS Integrated Communications 2782 Portage La Prairie —
2012-05-02 218-215 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 NASHWAUK MN
2012-05-02 224-308 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ROUND LAKE IL
2012-05-02 226-272 not yet reported which blocks → Iristel Inc. 154E London —
2012-05-02 289-307 not yet reported which blocks → Iristel Inc. 154E Markham —
2012-05-02 289-512 not yet reported which blocks → Iristel Inc. 154E Oshawa —
2012-05-02 289-817 not yet reported which blocks → Iristel Inc. 154E Oakville —
2012-05-02 438-792 not yet reported which blocks → Iristel Inc. 154E Montreal —
2012-05-02 438-793 not yet reported which blocks → Iristel Inc. 154E Montreal —
2012-05-02 438-794 not yet reported which blocks → Iristel Inc. 154E Montreal —
2012-05-02 438-795 not yet reported which blocks → Iristel Inc. 154E Montreal —
2012-05-02 438-796 not yet reported which blocks → Iristel Inc. 154E Montreal —
2012-05-02 579-999 not yet reported which blocks → Iristel Inc. 154E Longueuil —
2012-05-02 740-618 0–9 XXXall 10 · 9 holders which blocks → HORIZON SERVICES, INC. - OH 601G NEWARK OH
2012-05-02 819-510 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2012-05-02 902-201 not yet reported which blocks → Iristel Inc. 154E Charlottetown —
2012-05-02 989-439 0–9 XXXall 10 · 5 holders which blocks → CLEAR RATE COMMUNICATIONS, LLC 046L BAY CITY MI
2012-05-01 312-600 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2012-05-01 402-249 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E STROMSBURG NE
2012-05-01 469-314 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J ROCKWALL TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.