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
2013-09-17 385-887-5XXX 5000–5999Assigned QWEST CORPORATION 9636 MIDVALE UT
2013-09-17 385-887-6XXX 6000–6999Assigned QWEST CORPORATION 9636 MIDVALE UT
2013-09-17 385-887-7XXX 7000–7999Assigned QWEST CORPORATION 9636 MIDVALE UT
2013-09-13 385-223-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-09-13 385-223-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-09-12 385-288-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2013-09-09 385-777-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOUNTIFUL UT
2013-09-09 385-888-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2013-09-06 385-223-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PROVO UT
2013-09-05 385-210-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-09-05 385-222-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-09-05 385-222-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-09-05 385-222-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-09-05 385-223-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-09-05 385-223-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-09-05 385-288-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2013-09-05 385-290-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-09-04 385-325-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E SPRINGVL UT
2013-09-03 385-288-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 OGDEN UT
2013-09-03 385-288-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 OGDEN UT
2013-09-03 385-288-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 OGDEN UT
2013-08-23 385-269-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2013-08-20 385-220-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2013-08-20 385-222-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2013-08-20 385-222-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2013-08-20 385-265-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2013-08-20 385-393-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E CLEARFIELD UT
2013-08-08 385-222-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-08-08 385-223-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2013-08-08 385-333-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2013-08-07 385-695-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2013-07-10 385-345-3XXX 3000–3999Assigned QWEST CORPORATION 9636 LEHI UT
2013-07-03 385-222-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2013-06-25 385-209-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2013-06-21 385-207-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2013-06-20 385-325-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPRINGVL UT
2013-06-20 385-333-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2013-06-20 385-399-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F BOUNTIFUL UT
2013-06-19 385-207-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2013-06-19 385-333-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2013-06-19 385-722-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2013-06-19 385-722-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2013-06-19 385-888-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2013-06-18 385-474-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2013-06-17 385-399-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 BOUNTIFUL UT
2013-06-14 385-336-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2013-06-14 385-336-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2013-05-30 385-333-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2013-05-29 385-207-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2013-05-29 385-220-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON 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.