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
2013-12-19 816-219 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E PLATTECITY MO
2013-12-19 913-243 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MCLOUTH KS
2013-12-19 916-330 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2013-12-18 204-519 not yet reported which blocks → TELUS Integrated Communications 2782 Gimli —
2013-12-18 204-527 not yet reported which blocks → TELUS Integrated Communications 2782 Selkirk —
2013-12-18 204-530 not yet reported which blocks → TELUS Integrated Communications 2782 Stony Mountain —
2013-12-18 204-540 not yet reported which blocks → TELUS Integrated Communications 2782 Niverville —
2013-12-18 204-542 not yet reported which blocks → TELUS Integrated Communications 2782 Winkler —
2013-12-18 204-543 not yet reported which blocks → TELUS Integrated Communications 2782 Steinbach —
2013-12-18 248-385 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2013-12-18 253-328 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-12-18 343-288 not yet reported which blocks → Roxborough Telephone Company Ltd. 287H Cornwall —
2013-12-18 506-607 not yet reported which blocks → TELUS Mobility 8303 Saint John —
2013-12-18 509-571 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 YAKIMA WA
2013-12-18 571-888 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLES VA
2013-12-18 639-314 not yet reported which blocks → TELUS Mobility 8303 Prince Albert —
2013-12-18 647-670 not yet reported which blocks → Comwave Networks 160G Toronto —
2013-12-18 929-263 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2013-12-17 321-316 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WINTERPARK FL
2013-12-17 417-318 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 HOUSTON MO
2013-12-17 469-612 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2013-12-17 585-484 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 ROCHESTER NY
2013-12-17 832-994 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 CHANNELVW TX
2013-12-16 236-999 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2013-12-16 289-565 not yet reported which blocks → Distributel 082E Cooksville —
2013-12-16 505-267 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2013-12-16 778-641 not yet reported which blocks → CityWest Cable (North) Corp - BC 705F Hazelton —
2013-12-16 873-200 not yet reported which blocks → Videotron Ltd. 328F Sherbrooke —
2013-12-14 414-539 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2013-12-13 204-615 not yet reported which blocks → Shaw Telecom Inc. 497E Winnipeg —
2013-12-13 209-283 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 JACKSON CA
2013-12-13 225-217 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F NO CORNOR LA
2013-12-13 323-673 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2013-12-13 415-930 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2013-12-13 423-603 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C FORK RIDGE TN
2013-12-13 480-434 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-12-13 518-675 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ALTAMONT NY
2013-12-13 571-325 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2013-12-13 571-343 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 OCCOQUAN VA
2013-12-13 612-900 0–9 XXXall 10 · 3 holders which blocks → TEKSTAR COMMUNICATIONS, INC. 4156 TWINCITIES MN
2013-12-13 646-787 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2013-12-13 929-258 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
2013-12-13 939-349 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2013-12-13 939-366 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2013-12-12 208-494 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GRANGEVL ID
2013-12-12 256-801 0–9 XXXall 10 · 7 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J HUNTSVILLE AL
2013-12-12 334-801 0–9 XXXall 10 · 4 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J MONTGOMERY AL
2013-12-12 561-806 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BOYNTONBCH FL
2013-12-12 612-814 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2013-12-12 725-777 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV

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.