NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2011-12-22 314-287 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C KIRKWOOD MO
2011-12-22 318-575 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANSFIELD LA
2011-12-22 506-803 not yet reported which blocks → Iristel Inc. 154E Moncton —
2011-12-22 604-256 not yet reported which blocks → Iristel Inc. 154E New Westminster —
2011-12-22 778-812 not yet reported which blocks → ISP Telecom Inc. 4727 Vancouver —
2011-12-22 778-813 not yet reported which blocks → ISP Telecom Inc. 4727 Vancouver —
2011-12-22 902-290 not yet reported which blocks → Bragg Communications Inc. 421G Alberton —
2011-12-22 902-330 not yet reported which blocks → Bragg Communications Inc. 421G Charlottetown —
2011-12-22 902-372 not yet reported which blocks → Bragg Communications Inc. 421G Souris —
2011-12-22 902-380 not yet reported which blocks → Bragg Communications Inc. 421G Montague —
2011-12-22 902-786 not yet reported which blocks → Bragg Communications Inc. 421G Summerside —
2011-12-22 971-282 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
2011-12-21 289-779 not yet reported which blocks → Iristel Inc. 154E Hamilton —
2011-12-21 309-425 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C FIATT IL
2011-12-21 450-912 not yet reported which blocks → Iristel Inc. 154E Longueuil —
2011-12-21 513-510 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-12-21 513-580 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-12-21 604-900 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-12-21 604-901 not yet reported which blocks → Iristel Inc. 154E Vancouver —
2011-12-21 864-301 0–9 XXXall 10 · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 UNION SC
2011-12-21 902-702 not yet reported which blocks → Iristel Inc. 154E Halifax —
2011-12-20 215-278 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2011-12-20 343-333 not yet reported which blocks → Videotron Ltd. 383F Kingston —
2011-12-20 409-202 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C JASPER TX
2011-12-20 512-201 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2011-12-20 530-433 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHICO CA
2011-12-20 540-217 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J HARRISONBG VA
2011-12-20 540-225 0–9 XXXall 10 · 9 holders which blocks → COMCAST IP PHONE, LLC 318J STANLEY VA
2011-12-20 587-295 not yet reported which blocks → TELUS 8084 Calgary —
2011-12-20 724-442 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 FREDONIA PA
2011-12-20 778-700 not yet reported which blocks → Videotron Ltd. 383F Victoria —
2011-12-20 801-919 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2011-12-20 832-571 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-12-19 224-214 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKEGAN IL
2011-12-19 234-202 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANCHESTR OH
2011-12-19 330-290 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2011-12-19 330-890 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NO CANTON OH
2011-12-19 336-360 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J RAMSEUR NC
2011-12-19 530-461 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BANGOR CA
2011-12-19 602-419 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2011-12-19 602-425 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2011-12-19 614-609 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GROVEPORT OH
2011-12-19 803-248 4XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM SOUTH CAROLINA, INC. 0517 KERSHAW SC
2011-12-19 808-312 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 HONOLULU HI
2011-12-16 206-639 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
2011-12-16 289-302 not yet reported which blocks → Iristel Inc. 154E Niagara Falls —
2011-12-16 409-263 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C SOUTHVIDOR TX
2011-12-16 509-822 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - WA 483E SPOKANE WA
2011-12-16 708-304 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CRETE IL
2011-12-16 717-839 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARISBGZN1 PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.