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
2020-06-18 385-420-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2020-06-18 385-420-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2020-06-15 385-353-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-15 385-353-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-15 385-353-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-15 385-353-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-15 385-353-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-15 385-353-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-15 385-353-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-11 385-338-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2020-06-09 385-334-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-09 385-334-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-09 385-334-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-06-09 385-338-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 LEHI UT
2020-06-08 385-348-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KAYSVILLE UT
2020-06-04 385-340-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 BOUNTIFUL UT
2020-06-03 385-400-3XXX 3000–3999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H OGDEN UT
2020-05-28 385-318-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2020-05-28 385-318-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2020-05-21 385-344-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SPANIHFORK UT
2020-05-21 385-344-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SPANIHFORK UT
2020-05-21 385-344-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SPANIHFORK UT
2020-05-20 385-422-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON UT
2020-05-19 385-341-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2020-05-14 385-340-8XXX 8000–8999Assigned HD CARRIER LLC 321J BOUNTIFUL UT
2020-05-14 385-340-9XXX 9000–9999Assigned HD CARRIER LLC 321J BOUNTIFUL UT
2020-05-14 385-346-4XXX 4000–4999Assigned HD CARRIER LLC 321J MIDVALE UT
2020-05-14 385-346-5XXX 5000–5999Assigned HD CARRIER LLC 321J MIDVALE UT
2020-05-14 385-346-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2020-05-13 385-346-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2020-05-13 385-346-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2020-05-12 385-318-7XXX 7000–7999Assigned HD CARRIER LLC 321J MURRAY UT
2020-05-12 385-318-8XXX 8000–8999Assigned HD CARRIER LLC 321J MURRAY UT
2020-05-08 385-301-3XXX 3000–3999Assigned HD CARRIER LLC 321J SALT LAKE UT
2020-05-08 385-330-6XXX 6000–6999Assigned HD CARRIER LLC 321J PLEASATGRV UT
2020-05-08 385-330-9XXX 9000–9999Assigned HD CARRIER LLC 321J PLEASATGRV UT
2020-05-08 385-348-6XXX 6000–6999Assigned HD CARRIER LLC 321J KAYSVILLE UT
2020-05-08 385-348-7XXX 7000–7999Assigned HD CARRIER LLC 321J KAYSVILLE UT
2020-05-06 385-366-0XXX 0000–0999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-1XXX 1000–1999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-2XXX 2000–2999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-3XXX 3000–3999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-4XXX 4000–4999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-6XXX 6000–6999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-7XXX 7000–7999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-8XXX 8000–8999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-06 385-366-9XXX 9000–9999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-05-05 385-342-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2020-05-01 385-318-0XXX 0000–0999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H MURRAY 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.