NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2013-07-12 810-212 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 METAMORA MI
2013-07-12 810-221 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FLINT MI
2013-07-12 818-696 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GLENDALE CA
2013-07-11 204-691 not yet reported which blocks → Shaw Telecom Inc. 497E Winnipeg —
2013-07-11 204-692 not yet reported which blocks → Shaw Telecom Inc. 497E Portage La Prairie —
2013-07-11 209-292 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 STOCKTON CA
2013-07-11 306-952 not yet reported which blocks → Shaw Telecom Inc. 497E Saskatoon —
2013-07-11 306-983 not yet reported which blocks → Shaw Telecom Inc. 497E Moose Jaw —
2013-07-11 352-888 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G GAINESVL FL
2013-07-11 480-207 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2013-07-11 581-827 not yet reported which blocks → TELUS Quebec 8083 Bonaventure —
2013-07-11 581-830 not yet reported which blocks → TELUS Quebec 8083 Sept-Iles —
2013-07-11 581-832 not yet reported which blocks → TELUS Quebec 8083 Gaspe —
2013-07-11 631-658 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K E HAMPTON NY
2013-07-11 631-743 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K PTJEFFERSN NY
2013-07-11 646-693 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2013-07-11 682-305 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2013-07-11 708-904 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2013-07-10 234-303 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2013-07-10 267-758 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHLDLPHZN1 PA
2013-07-10 615-626 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2013-07-10 712-302 0–9 XXXall 10 · 9 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IA 8344 GLENWOOD IA
2013-07-10 763-316 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2013-07-10 832-954 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2013-07-10 913-401 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-07-09 216-303 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CLEVELAND OH
2013-07-09 224-336 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2013-07-09 224-413 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2013-07-09 224-415 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2013-07-09 224-432 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 GLENVIEW IL
2013-07-09 331-218 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WHEATON IL
2013-07-08 305-922 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 KEYS FL
2013-07-08 331-234 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SUGARGROVE IL
2013-07-08 567-368 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C PERRYSBURG OH
2013-07-08 786-461 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2013-07-05 269-883 0–9 XXXall 10 · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 BATTLE CRK MI
2013-07-05 361-426 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ROBSTOWN TX
2013-07-05 404-977 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-07-05 405-276 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OK 409F EL RENO OK
2013-07-05 405-369 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F MINCO OK
2013-07-05 405-578 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OK 409F YUKON OK
2013-07-05 405-731 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F MIDWEST CY OK
2013-07-05 579-248 not yet reported which blocks → TELUS Quebec 2243 Joliette —
2013-07-05 579-249 not yet reported which blocks → TELUS Quebec 2243 Sorel —
2013-07-05 579-250 not yet reported which blocks → TELUS Quebec 2243 Valleyfield —
2013-07-05 581-828 not yet reported which blocks → TELUS Quebec 2243 Alma —
2013-07-05 639-625 not yet reported which blocks → SaskTel 8091 Regina —
2013-07-05 646-774 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2013-07-05 845-366 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 HYDE PARK NY
2013-07-05 873-403 not yet reported which blocks → TELUS Quebec 2243 La Tuque —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.