NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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 781
BARR TELL USA, INC. - MA 11
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
2015-12-03 781-404-9XXX 9000–9999Assigned BARR TELL USA, INC. - MA 732H WOBURN MA
2015-12-03 781-469-7XXX 7000–7999Assigned BARR TELL USA, INC. - MA 732H LYNN MA
2015-12-03 781-510-5XXX 5000–5999Assigned BARR TELL USA, INC. - MA 732H RANDOLPH MA
2015-12-03 781-541-2XXX 2000–2999Assigned BARR TELL USA, INC. - MA 732H LEXINGTON MA
2015-12-03 781-703-9XXX 9000–9999Assigned BARR TELL USA, INC. - MA 732H WALTHAM MA
2015-12-03 781-819-1XXX 1000–1999Assigned BARR TELL USA, INC. - MA 732H ARLINGTON MA
2015-12-03 781-827-2XXX 2000–2999Assigned BARR TELL USA, INC. - MA 732H MEDFORD MA
2015-12-03 781-881-8XXX 8000–8999Assigned BARR TELL USA, INC. - MA 732H NORWOOD MA
2015-12-03 781-905-5XXX 5000–5999Assigned BARR TELL USA, INC. - MA 732H MALDEN MA
2015-12-03 781-922-5XXX 5000–5999Assigned BARR TELL USA, INC. - MA 732H REVERE MA
2015-12-03 781-980-5XXX 5000–5999Assigned BARR TELL USA, INC. - MA 732H BRAINTREE MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.