NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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, last 30 days — NPA 307
UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 20
ONVOY, LLC - WY 1
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2008-01-21 307-215-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CASPER WY
2007-12-27 307-670-6XXX 6000–6999Assigned QWEST CORPORATION 9636 GILLETTE WY
2007-12-19 307-256-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2007-12-19 307-256-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2007-12-19 307-256-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2007-12-19 307-466-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GREENRIVER WY
2007-12-05 307-257-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2007-11-26 307-333-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CASPER WY
2007-11-19 307-763-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SHERIDAN WY
2007-11-12 307-315-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2007-11-12 307-315-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2007-10-17 307-438-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LANDER WY
2007-10-08 307-200-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 JACKSON WY
2007-09-21 307-460-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LARAMIE WY
2007-09-18 307-460-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LARAMIE WY
2007-09-12 307-514-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHEYENNE WY
2007-06-22 307-438-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LANDER WY
2007-05-25 307-426-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHEYENNE WY
2007-05-15 307-315-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CASPER WY
2007-05-15 307-922-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2007-03-29 307-392-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F BORDER WY
2007-03-22 307-242-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F LAKE WY
2007-03-22 307-344-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F MAMMOTH WY
2007-03-22 307-545-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F OLDFATHFUL WY
2007-03-22 307-922-5XXX 5000–5999Assigned QWEST CORPORATION 9636 ROCK SPG WY
2007-03-16 307-481-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F LUSK WY
2007-03-14 307-460-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LARAMIE WY
2007-02-22 307-543-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F MORAN WY
2007-02-22 307-735-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F GLENDO WY
2007-02-22 307-939-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F WRIGHT WY
2007-02-15 307-257-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2007-02-07 307-554-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F GLENROCK WY
2007-02-07 307-828-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F KEMMERER WY
2007-01-22 307-461-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHERIDAN WY
2007-01-19 307-922-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2006-11-21 307-922-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2006-11-09 307-466-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 GREENRIVER WY
2006-10-27 307-417-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F RAWLINS WY
2006-10-25 307-257-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2006-10-25 307-257-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2006-10-17 307-269-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 WHEATLAND WY
2006-10-06 307-257-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F GILLETTE WY
2006-10-06 307-269-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F WHEATLAND WY
2006-10-06 307-271-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F POWELL WY
2006-10-06 307-288-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F EVANSTON WY
2006-10-06 307-460-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F LARAMIE WY
2006-10-06 307-463-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F RIVERTON WY
2006-10-06 307-655-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2006-09-25 307-213-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F CODY WY
2006-09-22 307-278-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F BUFFALO 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.