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
2017-05-23 385-274-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2017-05-23 385-278-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E KAYSVILLE UT
2017-05-23 385-489-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2017-05-22 385-264-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E OGDEN UT
2017-05-22 385-425-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E MURRAY UT
2017-05-22 385-497-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E PROVO UT
2017-05-18 385-274-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2017-05-10 385-285-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2017-05-01 385-274-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2017-04-11 385-497-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PROVO UT
2017-04-10 385-221-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-04-10 385-274-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2017-04-10 385-484-0XXX 0000–0999Assigned TELNYX LLC 073H LEHI UT
2017-04-10 385-497-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-04-10 385-497-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-04-10 385-497-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-04-10 385-497-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-04-10 385-497-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-04-10 385-497-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2017-03-31 385-274-0XXX 0000–0999Assigned TELNYX LLC 073H MIDVALE UT
2017-03-29 385-489-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOUNTIFUL UT
2017-03-29 385-895-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON UT
2017-03-28 385-264-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OGDEN UT
2017-03-28 385-278-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KAYSVILLE UT
2017-03-28 385-331-4XXX 4000–4999Assigned TELNYX LLC 073H AMERCNFORK UT
2017-03-28 385-394-0XXX 0000–0999Assigned TELNYX LLC 073H KAYSVILLE UT
2017-03-28 385-423-6XXX 6000–6999Assigned TELNYX LLC 073H CLEARFIELD UT
2017-03-28 385-425-6XXX 6000–6999Assigned TELNYX LLC 073H MURRAY UT
2017-03-28 385-440-9XXX 9000–9999Assigned TELNYX LLC 073H PLEASATGRV UT
2017-03-28 385-484-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEHI UT
2017-03-28 385-489-2XXX 2000–2999Assigned TELNYX LLC 073H BOUNTIFUL UT
2017-03-28 385-895-9XXX 9000–9999Assigned TELNYX LLC 073H PAYSON UT
2017-03-22 385-394-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2017-03-22 385-394-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2017-03-22 385-394-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2017-03-22 385-423-9XXX 9000–9999Assigned METROPCS, INC. 5562 CLEARFIELD UT
2017-03-20 385-253-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2017-03-20 385-434-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2017-03-20 385-434-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2017-03-20 385-434-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2017-03-17 385-285-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2017-03-09 385-256-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-261-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-261-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-261-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-261-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-285-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-285-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-285-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2017-03-09 385-499-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 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.