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
2020-08-24 385-354-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2020-08-20 385-758-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLEARFIELD UT
2020-08-12 385-346-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2020-08-11 385-357-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-11 385-357-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-11 385-357-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-11 385-357-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-11 385-357-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-11 385-400-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2020-08-11 385-421-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2020-08-06 385-354-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2020-08-04 385-353-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-353-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-356-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-04 385-842-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-08-04 385-842-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-08-04 385-842-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-08-04 385-842-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-08-04 385-842-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-08-03 385-307-0XXX 0000–0999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PROVO UT
2020-07-30 385-307-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2020-07-30 385-307-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2020-07-30 385-356-7XXX 7000–7999Assigned FRACTEL, LLC 965H AMERCNFORK UT
2020-07-30 385-356-9XXX 9000–9999Assigned FRACTEL, LLC 965H AMERCNFORK UT
2020-07-30 385-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H GOSHEN UT
2020-07-30 385-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H CLEARFIELD UT
2020-07-30 385-842-5XXX 5000–5999Assigned FRACTEL, LLC 965H KAYSVILLE UT
2020-07-30 385-855-5XXX 5000–5999Assigned FRACTEL, LLC 965H MIDVALE UT
2020-07-30 385-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H EAGLE MTN UT
2020-07-23 385-332-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-07-23 385-348-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-07-14 385-338-7XXX 7000–7999Assigned METROPCS, INC. 5562 LEHI UT
2020-07-09 385-330-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2020-07-09 385-338-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2020-07-09 385-338-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2020-07-09 385-346-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2020-07-06 385-354-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J SALT LAKE UT
2020-06-26 385-316-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON UT
2020-06-24 385-301-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2020-06-24 385-353-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 AMERCNFORK UT
2020-06-18 385-341-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2020-06-18 385-341-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2020-06-18 385-341-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H 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.