NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2004-11-05 416-768 not yet reported which blocks → Bell Mobility 6574 Toronto —
2004-11-05 819-332 not yet reported which blocks → Videotron Ltd. 8306 Aylmer —
2004-11-05 858-771 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C RNCHOSANFE CA
2004-11-04 201-772 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 KEARNY NJ
2004-11-04 347-448 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN08 NY
2004-11-04 347-556 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN08 NY
2004-11-04 347-610 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN08 NY
2004-11-04 347-776 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN08 NY
2004-11-04 347-813 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN08 NY
2004-11-04 403-373 not yet reported which blocks → TELUS Mobility 8301 Red Deer —
2004-11-04 512-664 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2004-11-04 573-604 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINONA MO
2004-11-04 573-953 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRCH TREE MO
2004-11-04 574-808 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 MONTICELLO IN
2004-11-04 651-431 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2004-11-04 832-400 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F ALVIN TX
2004-11-04 865-816 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 LENOIRCITY TN
2004-11-04 937-670 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 GREENVILLE OH
2004-11-04 979-800 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F GARWOOD TX
2004-11-03 450-205 not yet reported which blocks → Videotron Ltd. 8306 Ste-Anne-des-Plaines —
2004-11-03 450-617 not yet reported which blocks → Videotron Ltd. 8306 Beauharnois —
2004-11-03 867-334 not yet reported which blocks → Bell Mobility 6574 Whitehorse —
2004-11-03 867-445 not yet reported which blocks → Bell Mobility 6574 Yellowknife —
2004-11-02 256-849 0–9 XXXall 10 · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ALBERTVL AL
2004-11-02 325-233 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 SWEETWATER TX
2004-11-02 404-496 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2004-11-02 404-567 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2004-11-02 417-303 not yet reported which blocks → RYSTEC, INC 142C WEAUBLEAU MO
2004-11-02 423-489 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CUMBERLDGP TN
2004-11-02 440-218 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TRUMBULL OH
2004-11-02 559-803 0–9 XXXall 10 · 2 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRESNO CA
2004-11-02 608-413 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CROSS PL WI
2004-11-02 618-412 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CARBONDALE IL
2004-11-02 662-886 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GREENWOOD MS
2004-11-02 903-300 0–9 XXXall 10 · 4 holders which blocks → CUMBY TELEPHONE COOPERATIVE, INC. 4042 COOPER TX
2004-11-02 920-955 not yet reported which blocks → NORTHERN TELEPHONE AND DATA CORP. - WI 1519 APPLETON WI
2004-11-02 949-517 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 IRVINE CA
2004-11-01 224-218 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C HAMPSHIRE IL
2004-11-01 240-284 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 FROSTBURG MD
2004-11-01 240-288 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J THURMONT MD
2004-11-01 269-355 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ALLEGAN MI
2004-11-01 403-427 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Brooks —
2004-11-01 403-438 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Olds —
2004-11-01 404-393 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF GEORGIA, LP - GA 7490 ATLANTA GA
2004-11-01 417-305 not yet reported which blocks → RYSTEC, INC 142C COLLINS MO
2004-11-01 417-481 not yet reported which blocks → RYSTEC, INC 142C JERICO SPG MO
2004-11-01 417-495 not yet reported which blocks → RYSTEC, INC 142C BRONAUGH MO
2004-11-01 417-550 not yet reported which blocks → RYSTEC, INC 142C EVERTON MO
2004-11-01 417-564 not yet reported which blocks → RYSTEC, INC 142C GREENFIELD MO
2004-11-01 417-636 not yet reported which blocks → RYSTEC, INC 142C HUMANSVL MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.