NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2011-09-13 385-319-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-09-13 385-319-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-09-13 385-319-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-09-02 385-252-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-09-02 385-252-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-09-02 385-252-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-08-31 385-244-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2011-08-29 385-259-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-08-24 385-259-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2011-08-23 385-201-1XXX 1000–1999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D PROVO UT
2011-08-23 385-201-2XXX 2000–2999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D PROVO UT
2011-08-23 385-259-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2011-08-17 385-259-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2011-08-17 385-259-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2011-08-17 385-319-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E KAYSVILLE UT
2011-08-15 385-245-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2011-08-02 385-319-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2011-08-02 385-319-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2011-08-01 385-439-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F KAYSVILLE UT
2011-07-28 385-439-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-07-28 385-439-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-07-28 385-439-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-07-26 385-233-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2011-07-22 385-205-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2011-07-07 385-227-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-07-06 385-259-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-07-06 385-259-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-07-01 385-202-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-07-01 385-202-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-07-01 385-227-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-07-01 385-227-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-07-01 385-227-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-06-30 385-227-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-06-30 385-227-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-06-16 385-201-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2011-06-14 385-225-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2011-06-14 385-225-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2011-06-14 385-227-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-06-14 385-227-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-06-14 385-227-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2011-06-08 385-205-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2011-05-27 385-205-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2011-05-26 385-202-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2011-05-25 385-200-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2011-05-25 385-200-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2011-05-25 385-200-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2011-05-25 385-244-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2011-05-24 385-743-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MURRAY UT
2011-05-17 385-202-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2011-05-17 385-202-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.