NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2004-01-13 870-559 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MARION AR
2004-01-12 361-356 0–9 XXXall 10 · 5 holders which blocks → SMARTCOM TELEPHONE, LLC 4866 C CHRISTI TX
2004-01-12 403-689 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2004-01-12 450-931 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Cowansville —
2004-01-12 740-461 2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STEUBENVL OH
2004-01-12 785-299 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 6532 QUINTER KS
2004-01-12 812-670 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 NEW ALBANY IN
2004-01-12 830-301 0XXX2XXX3XXX5XXX6XXX · 4 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F JOURDANTON TX
2004-01-12 903-733 8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TEXARKANA TX
2004-01-10 808-454 3XXX7XXX which blocks → HAWAIIAN TELCOM, INC. - HI 3100 HONOLULU HI
2004-01-09 231-459 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J BOYNE CITY MI
2004-01-09 318-533 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JONESBORO LA
2004-01-09 478-224 not yet reported which blocks → COMSOUTH TELENET, INC. - GA 9161 PERRY GA
2004-01-09 570-355 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 POCONOLAKE PA
2004-01-09 575-551 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALAMOGORDO NM
2004-01-09 610-881 4XXX5XXX6XXX7XXX · 4 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 PEN ARGYL PA
2004-01-09 919-728 0–9 XXXall 10 · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 FRANKLINTN NC
2004-01-09 919-729 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LOUISBURG NC
2004-01-09 920-558 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NEENAH WI
2004-01-09 973-737 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K VERNON NJ
2004-01-09 973-749 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CSC VOICE, LLC 612K UPGRENWDLK NJ
2004-01-08 516-209 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NASSAUZN02 NY
2004-01-08 516-216 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2004-01-08 567-205 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J BLOOMINGVL OH
2004-01-08 567-206 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J LINDSEY OH
2004-01-08 567-243 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J CASTALIA OH
2004-01-08 567-246 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J WHITEHOUSE OH
2004-01-08 567-281 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J NEW RIEGEL OH
2004-01-08 606-225 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 OLIVE HILL KY
2004-01-08 606-234 not yet reported which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 LONDON KY
2004-01-08 606-239 not yet reported which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 MOREHEAD KY
2004-01-08 606-243 not yet reported which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 BARBOURVL KY
2004-01-08 606-299 not yet reported which blocks → EAST KENTUCKY NETWRK, LLC DBA APPALACHIAN WIRELESS 6940 SOMERSET KY
2004-01-08 847-636 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J DESPLAINES IL
2004-01-08 870-250 6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORDYCE AR
2004-01-07 214-383 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL 9533 ALLEN TX
2004-01-07 617-259 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2004-01-07 815-616 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 FREEPORT IL
2004-01-07 931-335 9XXX which blocks → UNITED STATES CELLULAR - TN 6278 CROSSVILLE TN
2004-01-06 786-499 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 MIAMI FL
2004-01-06 813-600 0–9 XXXall 10 · 3 holders which blocks → LINGO TELECOM, LLC 3840 TAMPACEN FL
2004-01-06 830-370 none assigned yet which blocks → METROPCS, INC. 5562 KERRVILLE TX
2004-01-06 905-970 not yet reported which blocks → Bell Canada 8051 Brampton —
2004-01-05 307-256 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 CHEYENNE WY
2004-01-05 417-653 not yet reported which blocks → BRIGHTSPEED OF MISSOURI, LLC 9784 AVA MO
2003-12-31 252-544 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 ROCKYMOUNT NC
2003-12-31 502-844 4XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SHELBYVL KY
2003-12-31 706-519 2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → BD OF WATER, LIGHT & SINKING FUND COMM, DBA DALTON 3139 TUNNELHILL GA
2003-12-31 706-939 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 CORNELIA GA
2003-12-31 814-499 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F TITUSVILLE PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.