NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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, all time — NPA 330
T-MOBILE USA, INC. 384
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
2023-08-30 330-552-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KENT OH
2023-08-04 330-200-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SHARON OH
2023-08-04 330-200-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SHARON OH
2022-02-23 330-839-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RAVENNA OH
2022-02-23 330-839-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RAVENNA OH
2022-02-23 330-839-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RAVENNA OH
2022-01-28 330-918-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2021-08-03 330-737-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MASSILLON OH
2021-02-05 330-223-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HANOVERTON OH
2021-02-01 330-964-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LISBON OH
2020-09-28 330-601-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2020-09-28 330-845-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2020-09-28 330-845-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2020-09-09 330-918-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2020-09-09 330-918-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2020-09-09 330-918-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2020-09-09 330-918-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2020-06-12 330-382-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELIVERPOOL OH
2020-06-12 330-382-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELIVERPOOL OH
2019-01-17 330-619-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SHARON OH
2019-01-17 330-619-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SHARON OH
2019-01-17 330-619-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SHARON OH
2018-10-19 330-305-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NO CANTON OH
2018-10-19 330-391-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 330-391-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 330-391-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 330-396-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MONTROSE OH
2018-10-19 330-934-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2017-09-08 330-439-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2017-09-08 330-462-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2017-09-08 330-462-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2017-03-07 330-460-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BRUNSWICK OH
2017-01-19 330-934-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2016-12-02 330-621-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2016-12-02 330-621-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOOSTER OH
2016-12-02 330-795-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2015-06-22 330-391-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2015-06-09 330-934-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2015-06-09 330-934-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2015-02-04 330-428-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALLIANCE OH
2015-02-04 330-428-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALLIANCE OH
2014-07-25 330-330-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2014-07-25 330-330-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2014-07-25 330-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH
2014-06-20 330-356-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALLIANCE OH
2014-06-20 330-596-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALLIANCE OH
2014-05-06 330-396-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MONTROSE OH
2014-05-06 330-396-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MONTROSE OH
2013-03-11 330-304-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2012-10-31 330-531-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 YOUNGSTOWN OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.