NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2002-09-03 231-907 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LUDINGTON MI
2002-09-03 517-677 0XXX4XXX5XXX7XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 COLDWATER MI
2002-09-03 815-975 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELVIDERE IL
2002-09-03 856-889 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 WILLIAMSTN NJ
2002-09-03 860-268 none assigned yet which blocks → METROPCS, INC. 5562 MANCHESTER CT
2002-09-03 860-538 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWBRITAIN CT
2002-09-03 970-557 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 GRANBY CO
2002-08-30 224-730 3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ZION IL
2002-08-30 231-432 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHPORT MI
2002-08-30 231-640 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE ANN MI
2002-08-30 231-651 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEULAH MI
2002-08-30 231-667 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION MI
2002-08-30 231-676 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLAIRE MI
2002-08-30 231-729 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IRONS MI
2002-08-30 231-794 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANISTEE MI
2002-08-30 231-835 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLEN LAKE MI
2002-08-30 231-866 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUTTONSBAY MI
2002-08-30 231-912 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REED CITY MI
2002-08-30 231-970 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEAR LAKE MI
2002-08-30 407-334 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2002-08-30 434-322 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ALBERTA VA
2002-08-30 540-481 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 EDINBURG VA
2002-08-30 562-331 6XXX7XXX which blocks → T-MOBILE USA, INC. 6529 ALAMITOS CA
2002-08-30 562-556 7XXX which blocks → T-MOBILE USA, INC. 6529 WHITTIER CA
2002-08-30 562-569 7XXX which blocks → T-MOBILE USA, INC. 6529 NORWALK CA
2002-08-30 562-644 not yet reported which blocks → T-MOBILE USA, INC. 6529 DOWNEY CA
2002-08-30 562-713 6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA HABRA CA
2002-08-30 562-832 1XXX4XXX5XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PICORIVERA CA
2002-08-30 562-841 7XXX which blocks → T-MOBILE USA, INC. 6529 LAKEWOOD CA
2002-08-30 630-699 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NAPERVILLE IL
2002-08-30 661-860 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLDL PLDL CA
2002-08-30 662-573 1XXX2XXX3XXX4XXX6XXX7XXX · 2 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 COLUMBUS MS
2002-08-30 715-864 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 EAU CLAIRE WI
2002-08-30 717-788 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WAYNESBORO PA
2002-08-30 727-755 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 HUDSON FL
2002-08-30 734-770 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MONROE MI
2002-08-30 785-718 3XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 TROY KS
2002-08-30 785-815 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 CIRCLEVL KS
2002-08-30 785-879 7XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 POWHATTAN KS
2002-08-30 802-662 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 ESSEX JCT VT
2002-08-30 831-676 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AT&T - LOCAL 7421 SALINAS CA
2002-08-30 850-533 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FTWALTNBCH FL
2002-08-30 858-504 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 RNCHOSANFE CA
2002-08-30 858-610 7XXX which blocks → T-MOBILE USA, INC. 6529 SNDG MRMS CA
2002-08-30 858-717 6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNDG LVTA CA
2002-08-30 858-733 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2002-08-30 858-776 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 RNCHOBRNDO CA
2002-08-30 931-671 1XXX5XXX7XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SANTA FE TN
2002-08-30 931-674 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J SPRINGHILL TN
2002-08-30 989-476 1XXX2XXX3XXX5XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORT HOPE MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.