NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2002-08-30 540-481 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
2002-08-30 989-582 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KINDE MI
2002-08-30 989-768 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTAUSTIN MI
2002-08-29 301-703 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 MOUNT AIRY MD
2002-08-29 416-909 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2002-08-29 417-241 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MARSHFIELD MO
2002-08-29 480-238 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2002-08-29 514-567 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2002-08-29 514-588 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2002-08-29 541-398 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - OR 6349 ENTERPRISE OR
2002-08-29 562-686 none assigned yet which blocks → T-MOBILE USA, INC. 6529 WHITTIER CA
2002-08-29 647-881 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2002-08-29 703-895 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2002-08-29 704-322 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALBEMARLE NC
2002-08-29 775-318 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUREKA NV
2002-08-29 803-393 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 JACKSON SC
2002-08-29 919-809 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - NC 6282 RALEIGH NC
2002-08-29 920-385 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OSHKOSH WI
2002-08-28 208-818 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID 6565 COERDALENE ID
2002-08-28 224-232 0–9 XXXall 10 · 6 holders which blocks → ILLINOIS BELL TEL CO 9329 ARLIGTNHTS IL
2002-08-28 252-562 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ELIZABTHCY NC
2002-08-28 252-565 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENVILLE NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.