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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2015-02-11 385-715-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2015-02-04 385-881-0XXX 0000–0999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H SALT LAKE UT
2015-01-29 385-498-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 AMERCNFORK UT
2015-01-22 385-248-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PROVO UT
2015-01-21 385-625-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2015-01-21 385-625-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2015-01-16 385-347-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MURRAY UT
2015-01-16 385-445-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-01-16 385-445-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-01-16 385-445-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-01-14 385-352-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 LEHI UT
2015-01-07 385-645-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2014-12-26 385-445-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-12-23 385-645-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-12-19 385-255-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-12-19 385-255-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-12-16 385-539-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-12-12 385-715-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2014-11-28 385-220-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON UT
2014-11-28 385-240-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2014-11-28 385-240-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2014-11-28 385-240-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2014-11-28 385-325-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPRINGVL UT
2014-11-28 385-374-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2014-11-28 385-374-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2014-11-28 385-424-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F KAYSVILLE UT
2014-11-28 385-424-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F KAYSVILLE UT
2014-11-28 385-999-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2014-11-28 385-999-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2014-11-26 385-498-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F AMERCNFORK UT
2014-11-26 385-498-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F AMERCNFORK UT
2014-11-24 385-345-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 LEHI UT
2014-11-14 385-498-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J AMERCNFORK UT
2014-11-06 385-345-8XXX 8000–8999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D LEHI UT
2014-10-31 385-240-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2014-10-31 385-240-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2014-10-31 385-240-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2014-10-30 385-445-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-10-30 385-539-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-10-28 385-241-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-10-28 385-241-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-10-28 385-495-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-10-28 385-495-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-10-28 385-495-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-10-28 385-495-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-10-28 385-495-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-10-28 385-535-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-10-28 385-539-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-10-28 385-539-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-10-28 385-539-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO 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.