NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
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
2003-02-05 662-635 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 INDIANOLA MS
2003-02-05 662-639 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 DURANT MS
2003-02-05 662-641 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 CLEVELAND MS
2003-02-05 662-646 1XXX2XXX3XXX5XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 AMORY MS
2003-02-05 662-649 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 DREW MS
2003-02-05 662-654 2XXX3XXX4XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 BATESVILLE MS
2003-02-05 662-661 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 ABERDEEN MS
2003-02-05 843-654 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2003-02-05 920-486 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2003-02-04 203-566 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-04 203-607 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 STAMFORD CT
2003-02-04 225-301 6XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ZACHARY LA
2003-02-04 253-267 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J TACOMA WA
2003-02-04 253-268 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PUYALLUP WA
2003-02-04 253-271 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J GRAHAM WA
2003-02-04 253-277 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J KENT WA
2003-02-04 270-899 none assigned yet which blocks → WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON 9690 LEITCHFLD KY
2003-02-04 423-494 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 LAFOLLETTE TN
2003-02-04 432-275 not yet reported which blocks → GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 TERMINAL TX
2003-02-04 573-326 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MARSTON MO
2003-02-04 601-523 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 WIGGINS MS
2003-02-04 631-252 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BRENTWOOD NY
2003-02-04 651-316 0XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MN 184D WABASHA MN
2003-02-04 706-522 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ELBERTON GA
2003-02-04 706-877 8XXX which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 AUGUSTA GA
2003-02-04 763-237 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CAMBRIDGE MN
2003-02-04 763-243 2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F PRINCETON MN
2003-02-04 845-558 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
2003-02-04 870-440 9XXX which blocks → T-MOBILE USA, INC. 6529 EL DORADO AR
2003-02-04 870-441 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PINE BLUFF AR
2003-02-03 334-340 not yet reported which blocks → BRIGHTSPEED OF ALABAMA, LLC - SOUTHERN 9788 DOTHAN AL
2003-02-03 614-425 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH
2003-02-03 712-216 3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 LOGAN IA
2003-02-03 712-304 3XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 EXIRA IA
2003-02-03 712-307 3XXX6XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 AVOCA IA
2003-01-31 204-212 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Neepawa —
2003-01-31 630-956 0–9 XXXall 10 · 2 holders which blocks → ILLINOIS BELL TEL CO 9329 ELMHURST IL
2003-01-31 778-549 not yet reported which blocks → Bell Mobility 6574 Aldergrove —
2003-01-31 780-251 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Fairview —
2003-01-31 808-768 none assigned yet which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 HONOLULU HI
2003-01-30 205-232 not yet reported which blocks → BRIGHTSPEED OF ALABAMA, LLC - NORTHERN 9789 WINFIELD AL
2003-01-30 216-242 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND OH
2003-01-30 307-675 not yet reported which blocks → ADVANCED COMMUNICATIONS TECHNOLOGY, INC. - WY 268A SHERIDAN WY
2003-01-30 308-528 1XXX2XXX · 2 holders which blocks → UNITED STATES CELLULAR - NE 6263 MINDEN NE
2003-01-30 318-462 none assigned yet which blocks → PAETEC ITEL, LLC 829J JONESBORO LA
2003-01-30 318-468 not yet reported which blocks → PAETEC ITEL, LLC 829J GRAMBLING LA
2003-01-30 330-341 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HANOVERTON OH
2003-01-30 337-350 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CENTERVL LA
2003-01-30 361-230 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ROCKPORT TX
2003-01-30 614-499 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COLUMBUS OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.