NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-08-01 707-532 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C LOLETA CA
2011-08-01 713-239 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2011-07-29 225-349 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2011-07-29 225-421 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2011-07-29 281-908 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-07-29 281-928 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-07-29 408-477 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS WEST CA
2011-07-29 408-498 0–9 XXXall 10 · 8 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SUNNYVALE CA
2011-07-29 541-615 0–9 XXXall 10 · 4 holders which blocks → WARM SPRINGS TELECOMMUNICATIONS COMPANY - OR 094G MADRAS OR
2011-07-29 612-224 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF MINNESOTA, LLC - MN 5312 TWINCITIES MN
2011-07-29 803-299 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 COLUMBIA SC
2011-07-29 832-564 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-07-28 225-250 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2011-07-28 404-850 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2011-07-28 438-804 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-07-28 438-805 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-07-28 440-222 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LORAIN OH
2011-07-28 469-242 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J IRVING TX
2011-07-28 530-762 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C PARADISE CA
2011-07-28 581-777 not yet reported which blocks → Fido Solutions Inc. 5643 Quebec —
2011-07-28 604-621 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Abbotsford —
2011-07-28 816-787 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2011-07-28 816-832 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2011-07-28 816-982 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2011-07-28 819-223 not yet reported which blocks → Videotron Ltd. 8306 Asbestos —
2011-07-28 956-250 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDINBURG TX
2011-07-28 972-810 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CARROLLTON TX
2011-07-27 202-743 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - DC 074F WSHNGTNZN1 DC
2011-07-27 289-301 not yet reported which blocks → Iristel Inc. 154E Markham —
2011-07-27 385-439 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-07-27 407-289 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2011-07-27 414-394 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-07-27 561-257 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BELLEGLADE FL
2011-07-27 647-497 not yet reported which blocks → Distributel 082E Toronto —
2011-07-27 702-659 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2011-07-27 708-545 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-27 779-236 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-27 816-438 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2011-07-27 872-237 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-07-27 954-268 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FTLAUDERDL FL
2011-07-26 204-403 not yet reported which blocks → TELUS Mobility 8303 Oakbank —
2011-07-26 438-801 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-07-26 438-802 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-07-26 438-803 not yet reported which blocks → Iristel Inc. 154E Montreal —
2011-07-26 612-223 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2011-07-26 778-779 not yet reported which blocks → Videotron Ltd. 383F Abbotsford —
2011-07-26 786-365 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2011-07-26 913-237 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2011-07-25 226-240 not yet reported which blocks → Iristel Inc. 154E Kitchener-Waterloo —
2011-07-25 226-785 not yet reported which blocks → Iristel Inc. 154E London —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.