NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 307
TELEPORT COMMUNICATIONS AMERICA WY-LLC 29
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2025-05-02 307-412-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CHEYENNE WY
2025-01-03 307-292-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CHEYENNE WY
2025-01-03 307-292-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CHEYENNE WY
2023-08-01 307-294-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G BIG PINEY WY
2023-07-13 307-289-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CHEYENNE WY
2023-03-16 307-458-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CASPER WY
2021-02-23 307-388-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G WORLAND WY
2020-10-16 307-338-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G TORRINGTON WY
2020-10-13 307-323-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G PINEDALE WY
2020-09-29 307-370-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G RAWLINS WY
2020-08-26 307-373-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G GREYBULL WY
2020-07-30 307-300-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G POWELL WY
2020-07-30 307-481-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G LUSK WY
2020-07-30 307-800-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G KEMMERER WY
2020-07-30 307-881-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G WHEATLAND WY
2020-07-29 307-226-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G AFTON WY
2020-07-29 307-364-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G GREENRIVER WY
2020-07-29 307-624-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G DOUGLAS WY
2018-03-01 307-855-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G RIVERTON WY
2016-08-11 307-829-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CHEYENNE WY
2014-11-24 307-578-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CODY WY
2014-10-22 307-621-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G BUFFALO WY
2014-09-02 307-429-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G SHERIDAN WY
2014-08-25 307-228-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G GILLETTE WY
2014-06-12 307-264-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G JACKSON WY
2014-06-12 307-314-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G LARAMIE WY
2014-04-30 307-448-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G ROCK SPG WY
2013-02-22 307-441-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CASPER WY
2012-08-02 307-823-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CHEYENNE WY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.