NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2019-04-16 385-328-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-04-16 385-328-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-04-12 385-552-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2019-04-12 385-552-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2019-04-11 385-500-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2019-04-10 385-286-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-286-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-286-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-286-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-286-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-286-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-286-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2019-04-10 385-300-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F BOUNTIFUL UT
2019-04-10 385-387-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-04-10 385-387-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J AMERCNFORK UT
2019-04-10 385-799-9XXX 9000–9999Assigned HD CARRIER LLC 321J SALT LAKE UT
2019-04-09 385-273-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2019-04-09 385-273-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2019-04-09 385-273-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2019-04-09 385-273-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2019-04-08 385-294-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2019-04-05 385-422-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 PAYSON UT
2019-03-29 385-387-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-03-29 385-387-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-03-29 385-387-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2019-03-27 385-303-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F KAYSVILLE UT
2019-03-26 385-381-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON UT
2019-03-25 385-303-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-25 385-303-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-21 385-500-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2019-03-21 385-500-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2019-03-19 385-294-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2019-03-19 385-466-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2019-03-19 385-466-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
2019-03-15 385-301-0XXX 0000–0999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D SALT LAKE UT
2019-03-13 385-286-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2019-03-13 385-286-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2019-03-12 385-425-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MURRAY UT
2019-03-11 385-437-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SPANIHFORK UT
2019-03-08 385-296-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2019-03-01 385-301-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2019-03-01 385-302-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2019-03-01 385-302-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.