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
2011-04-20 681-203 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2011-04-20 681-427 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2011-04-20 832-776 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-04-20 949-441 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CAPITRNVLY CA
2011-04-19 347-774 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN08 NY
2011-04-19 475-202 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2011-04-19 518-405 0–9 XXXall 10 · 6 holders which blocks → NEW DIMENSION WIRELESS LTD 825D PLATTSBG NY
2011-04-19 520-812 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2011-04-19 641-317 0XXX1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → GREENWAY COMMUNICATIONS L.L.C. - IA 860F KANAWHA IA
2011-04-19 865-336 0–9 XXXall 10 · 7 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MARYVILLE TN
2011-04-19 929-268 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN08 NY
2011-04-18 202-322 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN1 DC
2011-04-18 204-504 not yet reported which blocks → Shaw Telecom Inc. 497E Winnipeg —
2011-04-18 336-898 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2011-04-18 438-381 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2011-04-18 450-519 not yet reported which blocks → ISP Telecom Inc. 4727 Ste-Martine —
2011-04-18 450-520 not yet reported which blocks → ISP Telecom Inc. 4727 St-Chrysostome —
2011-04-18 540-642 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F FREDECKSBG VA
2011-04-18 636-725 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J FSSCRSTLCY MO
2011-04-18 763-710 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2011-04-18 778-368 not yet reported which blocks → TELUS 8086 Whalley —
2011-04-18 816-825 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2011-04-18 910-726 0–9 XXXall 10 · 5 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C WILMINGTON NC
2011-04-17 857-500 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2011-04-15 216-273 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C CLEVELAND OH
2011-04-15 225-220 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C BATONROUGE LA
2011-04-15 225-428 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 BATONROUGE LA
2011-04-15 319-777 0–9 XXXall 10 · 5 holders which blocks → AUREON COMMUNICATIONS, LLC 444G CEDAR RPDS IA
2011-04-15 408-708 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS NORTH CA
2011-04-15 408-713 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GILROY CA
2011-04-15 415-854 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNFC CNTRL CA
2011-04-15 424-274 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BEVERLYHLS CA
2011-04-15 512-221 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-04-15 515-609 5XXX which blocks → GREENWAY COMMUNICATIONS L.L.C. - IA 860F CORWITH IA
2011-04-15 774-243 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WORCESTER MA
2011-04-15 919-814 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 RALEIGH NC
2011-04-15 980-307 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 CHARLOTTE NC
2011-04-14 423-271 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 SWEETWATER TN
2011-04-14 713-955 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOUSTON TX
2011-04-14 832-291 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-04-14 901-900 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MEMPHIS TN
2011-04-13 484-503 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 EASTON PA
2011-04-13 615-689 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NASHVILLE TN
2011-04-13 702-546 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2011-04-13 715-802 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WAUPACA WI
2011-04-13 775-500 0XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CARLIN NV
2011-04-12 215-617 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHLDLPHZN1 PA
2011-04-12 225-399 0–9 XXXall 10 · 5 holders which blocks → RESERVE LONG DIST CO DBA RESERVE TELECOMM - LA 3610 CONVENT LA
2011-04-12 318-350 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONROE LA
2011-04-12 347-343 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN13 NY

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.