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
2014-09-15 385-539-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-09-08 385-419-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-09-08 385-419-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-09-08 385-419-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-09-05 385-241-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PROVO UT
2014-09-03 385-419-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-09-03 385-419-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-09-03 385-539-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-09-03 385-831-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-08-29 385-309-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-08-28 385-231-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2014-08-28 385-237-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2014-08-27 385-230-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-08-27 385-238-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2014-08-27 385-299-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-08-27 385-405-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2014-08-22 385-231-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-08-22 385-231-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-08-22 385-231-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-08-22 385-375-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PROVO UT
2014-08-21 385-237-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-08-21 385-237-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-08-21 385-237-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-08-21 385-237-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-08-21 385-238-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2014-08-21 385-238-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2014-08-15 385-887-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2014-08-12 385-219-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-08-12 385-230-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-08-12 385-230-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-08-12 385-230-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-08-12 385-230-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-08-12 385-265-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AMERCNFORK UT
2014-08-12 385-405-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2014-08-12 385-405-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2014-08-07 385-299-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-08-07 385-800-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2014-08-05 385-299-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-08-05 385-299-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2014-08-05 385-777-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2014-08-05 385-800-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MURRAY UT
2014-07-29 385-236-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-07-29 385-335-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-07-25 385-405-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OGDEN UT
2014-07-22 385-231-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-07-22 385-231-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-07-15 385-216-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-07-15 385-216-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-07-15 385-216-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-07-15 385-290-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 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.