NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
2005-09-14 620-292 0–9 XXXall 10 · 6 holders which blocks → NEX-TECH WIRELESS, LLC 122D HOISINGTON KS
2005-09-14 620-377 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEX-TECH WIRELESS, LLC 122D ST JOHN KS
2005-09-14 620-566 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → NEX-TECH WIRELESS, LLC 122D ELLINWOOD KS
2005-09-14 620-992 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → NEX-TECH WIRELESS, LLC 122D CLAFLIN KS
2005-09-14 716-512 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BUFFALO NY
2005-09-14 931-644 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 COOKEVILLE TN
2005-09-14 931-952 4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MANCHESTER TN
2005-09-13 231-288 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2005-09-13 254-393 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NOLANVILLE TX
2005-09-13 337-544 4XXX5XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SUGARTOWN LA
2005-09-13 605-475 none assigned yet which blocks → NORTHERN VALLEY COMMUNICATIONS, LLC 6125 REDFIELD SD
2005-09-13 702-449 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2005-09-13 714-862 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D SANTA ANA CA
2005-09-13 715-801 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PESHTIGO WI
2005-09-13 734-224 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C TEMPERANCE MI
2005-09-13 734-568 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLCV - MI 543C LAMBERTVL MI
2005-09-13 773-641 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-09-13 816-886 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J KANSASCITY MO
2005-09-13 857-488 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-09-13 859-360 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COVINGTON KY
2005-09-13 989-646 1XXX2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AU GRES MI
2005-09-12 207-449 0–9 XXXall 10 · 4 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 BRUNSWICK ME
2005-09-12 239-222 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORT MYERS FL
2005-09-12 239-223 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORT MYERS FL
2005-09-12 435-817 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST GEORGE UT
2005-09-12 480-522 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2005-09-12 503-934 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9638 SALEM OR
2005-09-12 507-676 8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 OWATONNA MN
2005-09-12 507-993 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 ROCHESTER MN
2005-09-12 734-388 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DEXTER MI
2005-09-12 830-733 0–9 XXXall 10 · 8 holders which blocks → WINDSTREAM COMMUNICATIONS TELECOM, L.P. - TX 1997 FREDECKSBG TX
2005-09-12 831-756 0–9 XXXall 10 · 2 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 SALINAS CA
2005-09-12 951-801 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIVERSIDE CA
2005-09-10 320-535 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - MN 184D LITCHFIELD MN
2005-09-09 432-755 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 PECOS TX
2005-09-08 250-294 not yet reported which blocks → Bell West Inc. 2933 Victoria —
2005-09-08 310-848 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAWTHORNE CA
2005-09-08 310-988 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2005-09-08 352-229 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OCALA FL
2005-09-08 714-837 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 WESTMINSTR CA
2005-09-08 719-352 0–9 XXXall 10 · 3 holders which blocks → XO COLORADO, LLC 8980 COLORDOSPG CO
2005-09-08 778-329 not yet reported which blocks → Bell West Inc. 2933 Vancouver —
2005-09-07 403-695 not yet reported which blocks → Bell West Inc. 2933 Calgary —
2005-09-07 443-452 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J BALTIMORE MD
2005-09-07 469-735 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 IRVING TX
2005-09-07 514-292 not yet reported which blocks → Bell Mobility 6574 Montreal —
2005-09-07 541-805 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 LA GRANDE OR
2005-09-07 604-865 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Sechelt —
2005-09-07 631-946 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SELDEN NY
2005-09-07 647-238 not yet reported which blocks → Bell Mobility 6574 Toronto —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.