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
2012-01-25 385-428-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MURRAY UT
2012-01-17 385-313-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2012-01-09 385-282-2XXX 2000–2999Assigned QWEST CORPORATION 9636 SALT LAKE UT
2012-01-06 385-313-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2012-01-05 385-203-0XXX 0000–0999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-203-1XXX 1000–1999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-203-2XXX 2000–2999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-203-3XXX 3000–3999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-203-4XXX 4000–4999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-203-5XXX 5000–5999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-203-6XXX 6000–6999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 PROVO UT
2012-01-05 385-275-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2011-12-15 385-215-1XXX 1000–1999Assigned NUSO, LLC 551G SALT LAKE UT
2011-11-22 385-282-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-11-22 385-282-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-11-22 385-282-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-11-16 385-225-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2011-11-16 385-245-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2011-11-04 385-282-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2011-11-04 385-282-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2011-10-27 385-282-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SALT LAKE UT
2011-10-20 385-225-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PROVO UT
2011-10-19 385-201-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2011-10-19 385-201-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2011-10-19 385-319-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2011-10-03 385-205-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2011-10-03 385-244-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2011-09-28 385-282-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2011-09-28 385-313-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2011-09-28 385-439-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-09-28 385-439-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-09-22 385-244-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 OGDEN UT
2011-09-21 385-225-8XXX 8000–8999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2011-09-20 385-399-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F BOUNTIFUL UT
2011-09-19 385-242-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-19 385-242-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-19 385-242-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-19 385-242-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-19 385-242-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-15 385-205-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2011-09-14 385-201-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2011-09-14 385-201-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2011-09-14 385-201-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2011-09-14 385-201-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2011-09-14 385-201-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2011-09-14 385-229-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-14 385-252-0XXX 0000–0999Assigned METROPCS, INC. 5562 SALT LAKE UT
2011-09-14 385-252-1XXX 1000–1999Assigned METROPCS, INC. 5562 SALT LAKE UT
2011-09-14 385-252-2XXX 2000–2999Assigned METROPCS, INC. 5562 SALT LAKE UT
2011-09-13 385-319-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 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.