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
2025-08-06 385-606-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-606-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-606-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-606-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-06 385-609-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2025-08-05 385-514-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J OGDEN UT
2025-07-30 385-574-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2025-07-30 385-574-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2025-07-30 385-574-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2025-07-30 385-608-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2025-07-18 385-514-5XXX 5000–5999Assigned NUSO, LLC 732J OGDEN UT
2025-07-15 385-584-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2025-07-15 385-606-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 SALT LAKE UT
2025-07-11 385-606-6XXX 6000–6999Assigned HD CARRIER LLC 321J SALT LAKE UT
2025-07-11 385-606-7XXX 7000–7999Assigned HD CARRIER LLC 321J SALT LAKE UT
2025-06-30 385-584-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SALT LAKE UT
2025-06-26 385-582-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2025-06-26 385-604-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2025-06-18 385-601-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-18 385-608-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2025-06-05 385-579-5XXX 5000–5999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D AMERCNFORK UT
2025-06-05 385-579-6XXX 6000–6999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D AMERCNFORK UT
2025-06-05 385-579-7XXX 7000–7999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D AMERCNFORK UT
2025-06-04 385-577-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-577-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2025-06-04 385-607-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE 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.