NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2013-11-01 579-438 not yet reported which blocks → Videotron Ltd. 8306 Knowlton —
2013-11-01 579-439 not yet reported which blocks → Cooptel 818D Waterloo —
2013-11-01 580-297 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K ENID OK
2013-11-01 581-312 not yet reported which blocks → Videotron Ltd. 8306 Saint-Come —
2013-11-01 606-506 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CSC VOICE, LLC 612K PRESTONSBG KY
2013-11-01 709-221 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B St. John's —
2013-11-01 709-999 not yet reported which blocks → TELUS Integrated Communications 2782 St. John's —
2013-11-01 832-990 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K HUFFMAN TX
2013-11-01 918-910 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K MUSKOGEE OK
2013-10-31 206-939 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2013-10-31 385-219 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PROVO UT
2013-10-31 559-387 0–9 XXXall 10 · 5 holders which blocks → PACIFIC BELL 9740 CLOVIS CA
2013-10-31 612-704 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2013-10-31 662-702 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → CSC VOICE, LLC 612K GREENVILLE MS
2013-10-31 779-704 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 MCHENRY IL
2013-10-31 786-702 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORTH DADE FL
2013-10-31 903-554 0–9 XXXwhole prefix which blocks → PEOPLES COMMUNICATION, INC. -TX 135H GREENVILLE TX
2013-10-31 903-760 0–9 XXXwhole prefix which blocks → PEOPLES COMMUNICATION, INC. -TX 135H QUITMAN TX
2013-10-31 956-900 0–9 XXXall 10 · 3 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D EDINBURG TX
2013-10-30 289-410 not yet reported which blocks → Distributel 082E Brampton —
2013-10-30 289-545 not yet reported which blocks → Distributel 082E Ajax-Pickering —
2013-10-30 289-550 not yet reported which blocks → Distributel 082E Richmond Hill —
2013-10-30 289-730 not yet reported which blocks → Distributel 082E Newmarket —
2013-10-30 289-745 not yet reported which blocks → Distributel 082E Burlington —
2013-10-30 343-925 not yet reported which blocks → Distributel 082E Ottawa-Hull —
2013-10-29 240-495 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN4 MD
2013-10-29 240-532 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2013-10-29 252-689 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K GREENVILLE NC
2013-10-29 289-537 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Richmond Hill —
2013-10-29 289-554 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Markham —
2013-10-29 343-221 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Orleans —
2013-10-29 567-324 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ROCKFORD OH
2013-10-29 585-481 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2013-10-29 601-539 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C LYNVILLE MS
2013-10-29 709-217 not yet reported which blocks → TELUS Mobility 8303 Happy Valley - Goose Bay —
2013-10-29 716-327 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 TONAWANDA NY
2013-10-29 720-726 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2013-10-29 806-453 none assigned yet which blocks → CEBRIDGE TELECOM TX , L.P. - TX 318C FARWELL TX
2013-10-29 812-954 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 AURORA IN
2013-10-29 870-296 none assigned yet which blocks → TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G BULLSHOALS AR
2013-10-29 870-444 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K EL DORADO AR
2013-10-29 870-471 none assigned yet which blocks → TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G GASSVILLE AR
2013-10-29 870-520 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K JONESBORO AR
2013-10-29 913-245 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K OSAWATOMIE KS
2013-10-28 308-777 not yet reported which blocks → GREAT PLAINS BROADBAND, INC. - NE 012E MCCOOK NE
2013-10-25 202-847 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J WSHNGTNZN1 DC
2013-10-25 204-618 not yet reported which blocks → MTS Inc. 991B Eddystone —
2013-10-25 312-809 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHICGOZN01 IL
2013-10-25 317-975 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 CARMEL IN
2013-10-25 317-992 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 INDIANAPLS IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.