NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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 385
LEVEL 3 COMMUNICATIONS, LLC - UT 5
BANDWIDTH.COM CLEC, LLC - UT 5
NEW CINGULAR WIRELESS PCS, LLC 4
ONVOY, LLC - UT 2
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
2014-04-02 385-528-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-04-02 385-528-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-03-28 385-207-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-03-28 385-269-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2014-03-27 385-207-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2014-03-27 385-695-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-03-27 385-887-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-03-27 385-887-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-03-26 385-222-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-03-18 385-444-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-03-18 385-444-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-03-14 385-444-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-03-13 385-236-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-03-13 385-444-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-03-13 385-444-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-03-13 385-474-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MURRAY UT
2014-03-13 385-800-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MURRAY UT
2014-03-07 385-999-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SPANIHFORK UT
2014-03-05 385-219-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-03-05 385-375-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-02-26 385-245-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-02-26 385-626-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2014-02-26 385-626-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2014-02-25 385-288-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OGDEN UT
2014-02-24 385-444-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-02-24 385-444-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-02-24 385-722-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-02-17 385-444-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-02-07 385-235-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-02-05 385-235-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2014-02-03 385-375-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-01-29 385-235-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-01-24 385-375-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2014-01-22 385-626-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2014-01-17 385-325-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D SPRINGVL UT
2014-01-16 385-888-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KAYSVILLE UT
2014-01-15 385-235-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D SALT LAKE UT
2014-01-15 385-265-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D AMERCNFORK UT
2014-01-15 385-269-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D PLEASATGRV UT
2014-01-15 385-887-9XXX 9000–9999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2014-01-15 385-999-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D SPANIHFORK UT
2014-01-14 385-219-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2014-01-14 385-887-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2014-01-03 385-216-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-01-03 385-216-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-01-03 385-216-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-01-03 385-219-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-01-03 385-219-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-01-03 385-219-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-01-03 385-235-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT

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.