NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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
2002-06-10 708-743 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2002-06-10 716-904 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OLEAN NY
2002-06-10 915-787 0XXX6XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 EL PASO TX
2002-06-07 224-436 5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LAKEFOREST IL
2002-06-07 361-602 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KINGSVILLE TX
2002-06-07 417-388 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CARTHAGE MO
2002-06-07 417-389 6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEOSHO MO
2002-06-07 423-482 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 BLOUNTVL TN
2002-06-07 423-483 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 JOHNSON CY TN
2002-06-07 423-484 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 BRISTOL TN
2002-06-07 636-627 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST CHARLES MO
2002-06-07 732-939 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MIDDLETOWN NJ
2002-06-07 774-849 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ROCHESTER MA
2002-06-07 808-368 9XXX which blocks → METROPCS, INC. 5562 HONOLULU HI
2002-06-07 808-482 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 LIHUE HI
2002-06-07 908-723 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SUMMIT NJ
2002-06-07 910-393 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → METROPCS, INC. 5562 SEASIDE NC
2002-06-07 920-531 0XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C NEW LONDON WI
2002-06-06 216-262 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND OH
2002-06-06 219-228 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMMOND IN
2002-06-06 250-601 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Chetwynd —
2002-06-06 260-228 2XXX3XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 WARREN IN
2002-06-06 306-260 not yet reported which blocks → SaskTel Mobility 9868 Saskatoon —
2002-06-06 314-274 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 LADUE MO
2002-06-06 419-500 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FAYETTE OH
2002-06-06 419-546 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 EVANSPORT OH
2002-06-06 419-600 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SCOTT OH
2002-06-06 419-614 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WESTON OH
2002-06-06 440-335 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K KINGSVILLE OH
2002-06-06 567-210 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRYAN OH
2002-06-06 573-451 1XXX2XXX3XXX4XXX · 2 holders which blocks → FIDELITY CABLEVISION, LLC 3275 ST ROBERT MO
2002-06-06 573-452 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → FIDELITY CABLEVISION, LLC 3275 FTLENARDWD MO
2002-06-06 573-453 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FIDELITY CABLEVISION, LLC 3275 SALEM MO
2002-06-06 573-456 2XXX which blocks → FIDELITY CABLEVISION, LLC 3275 NEWBURG MO
2002-06-06 573-460 0XXX2XXX6XXX · 3 holders which blocks → FIDELITY CABLEVISION, LLC 3275 RICHLAND MO
2002-06-06 601-337 not yet reported which blocks → CELLULAR SOUTH, INC. 6581 PICAYUNE MS
2002-06-06 601-724 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BRANDON MS
2002-06-06 601-834 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 GLOSTER MS
2002-06-06 601-910 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CLINTON MS
2002-06-06 601-931 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROOKHAVEN MS
2002-06-06 647-430 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 8377 Toronto —
2002-06-06 704-328 0–9 XXXwhole prefix which blocks → WINDSTREAM COMMUNICATIONS, INC. - NC 7970 CHARLOTTE NC
2002-06-06 706-618 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DALTON GA
2002-06-05 208-629 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 BOISE ID
2002-06-05 208-639 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 BOISE ID
2002-06-05 224-558 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2002-06-05 409-540 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 NDLDPTNCHS TX
2002-06-05 419-800 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WAYNEBRDNR OH
2002-06-05 419-900 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PEMBERVL OH
2002-06-05 419-974 1XXX4XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BETTSVILLE OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.