NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2004-12-21 270-814 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J LUCAS KY
2004-12-21 307-629 0XXX1XXX2XXX4XXX6XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWCASTLE WY
2004-12-21 571-204 0–9 XXXwhole prefix which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-20 315-806 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FULTON NY
2004-12-20 403-927 not yet reported which blocks → Globalstar 6996 Calgary —
2004-12-20 517-288 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SUNFIELD MI
2004-12-20 517-477 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOLT MI
2004-12-20 519-999 not yet reported which blocks → TELUS Mobility 8303 Windsor —
2004-12-20 616-545 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORLEANS MI
2004-12-20 651-927 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LAKE CITY MN
2004-12-17 208-559 0–9 XXXall 10 · 2 holders which blocks → SYRINGA NETWORKS, LLC 5869 BOISE ID
2004-12-17 250-321 not yet reported which blocks → TELUS Mobility 8301 Fort Nelson —
2004-12-17 251-244 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 PETERMAN AL
2004-12-17 573-870 1XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VAN BUREN MO
2004-12-16 224-267 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ANTIOCH IL
2004-12-16 251-428 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HUXFORD AL
2004-12-16 309-514 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ALBANY IL
2004-12-16 309-515 0XXX1XXX2XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ERIE IL
2004-12-16 646-736 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2004-12-16 801-682 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 KAYSVILLE UT
2004-12-16 904-257 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BALDWIN FL
2004-12-16 909-743 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 FONTANA CA
2004-12-16 931-584 0–9 XXXall 10 · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 MONTEREY TN
2004-12-15 361-585 0–9 XXXall 10 · 2 holders which blocks → STPCS JOINT VENTURE, LLC 4290 C CHRISTI TX
2004-12-15 430-558 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F LONGVIEW TX
2004-12-15 432-789 1XXX2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MIDLAND TX
2004-12-15 715-818 not yet reported which blocks → CENTRAL WISCONSIN COMMUNICATIONS, INC. - WI 997C WISCOSNRPD WI
2004-12-15 806-939 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LUBBOCK TX
2004-12-15 850-401 0–9 XXXall 10 · 8 holders which blocks → SOUTHERN COMMUNICATIONS SERVICES, INC. 6744 DFUNIAKSPG FL
2004-12-15 912-515 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STATESBORO GA
2004-12-15 913-586 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 DE SOTO KS
2004-12-15 915-224 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F EL PASO TX
2004-12-15 951-623 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PERRIS CA
2004-12-14 252-722 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J COINJOCK NC
2004-12-14 252-876 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J NEW BERN NC
2004-12-14 309-626 0XXX2XXX3XXX6XXX7XXX · 4 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ORION IL
2004-12-14 603-831 0–9 XXXall 10 · 3 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 GREENFIELD NH
2004-12-14 716-785 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 FREDONIA NY
2004-12-14 828-404 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J HICKORY NC
2004-12-14 860-477 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K STORRS CT
2004-12-14 905-419 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Bowmanville —
2004-12-14 905-425 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Brooklin —
2004-12-14 905-445 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Hampton —
2004-12-14 905-446 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Newcastle —
2004-12-14 905-485 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Orono —
2004-12-14 905-492 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B South Pickering —
2004-12-14 905-493 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Whitby —
2004-12-14 905-956 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Malton —
2004-12-14 905-997 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Streetsville —
2004-12-13 210-855 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.