NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 724
ARMSTRONG TELECOMMUNICATIONS, INC. - PA 76
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
2025-11-24 724-473-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C ZELIENOPLE PA
2023-08-03 724-534-5XXX 5000–5999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C MURDOCKSVL PA
2014-11-13 724-473-4XXX 4000–4999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C ZELIENOPLE PA
2012-11-08 724-687-7XXX 7000–7999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C MARS PA
2010-12-21 724-297-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C WORTHINGTN PA
2010-08-25 724-719-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C WEXFORD PA
2010-05-11 724-591-8XXX 8000–8999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C CRIDERSCOR PA
2010-01-08 724-256-9XXX 9000–9999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BUTLER PA
2009-10-19 724-326-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C FAYETTE CY PA
2009-09-29 724-603-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C CONNELLSVL PA
2009-05-01 724-828-2XXX 2000–2999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C MIDWAY PA
2008-09-26 724-252-1XXX 1000–1999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C ALIQUIPPA PA
2008-09-18 724-256-8XXX 8000–8999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BUTLER PA
2008-09-17 724-867-4XXX 4000–4999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C EMLENTON PA
2008-08-11 724-215-8XXX 8000–8999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BURGETTSTN PA
2008-08-11 724-528-7XXX 7000–7999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C WMIDDLESEX PA
2008-08-11 724-964-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C NEWBEDFORD PA
2008-06-13 724-901-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C NEWWLMNGTN PA
2007-11-13 724-256-5XXX 5000–5999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BUTLER PA
2007-11-13 724-591-5XXX 5000–5999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C CRIDERSCOR PA
2007-10-08 724-323-8XXX 8000–8999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C UNIONTOWN PA
2007-10-08 724-364-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BROWNSVL PA
2007-10-08 724-398-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C DAWSON PA
2007-10-08 724-404-8XXX 8000–8999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C YOUNGWOOD PA
2007-10-08 724-405-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C WESTNEWTON PA
2007-10-08 724-480-4XXX 4000–4999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C ROCHESTER PA
2007-10-08 724-565-7XXX 7000–7999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C CHARLEROI PA
2007-10-08 724-740-1XXX 1000–1999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C WAMPUM PA
2007-10-05 724-269-7XXX 7000–7999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C MERCER PA
2007-10-05 724-359-5XXX 5000–5999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BEAVER FLS PA
2007-10-05 724-924-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C PRINCETON PA
2007-08-10 724-306-1XXX 1000–1999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C PROSPECT PA
2007-08-10 724-368-4XXX 4000–4999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C PORTERSVL PA
2007-08-10 724-376-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C SANDY LAKE PA
2007-08-10 724-406-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C SLIPPERYRK PA
2007-08-10 724-432-3XXX 3000–3999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C EVANS CITY PA
2007-08-10 724-476-1XXX 1000–1999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C W SUNBURY PA
2007-08-10 724-481-1XXX 1000–1999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C NIXON PA
2007-08-10 724-482-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C MERIDIAN PA
2007-08-10 724-486-3XXX 3000–3999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C CONOQNSSNG PA
2007-08-10 724-607-1XXX 1000–1999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C CHICORA PA
2007-08-10 724-735-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C HARRISVL PA
2007-07-27 724-475-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C FREDONIA PA
2007-05-24 724-201-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C ELLWOOD CY PA
2007-05-07 724-264-4XXX 4000–4999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C GROVE CITY PA
2007-05-07 724-333-8XXX 8000–8999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C NEW CASTLE PA
2007-05-07 724-473-0XXX 0000–0999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C ZELIENOPLE PA
2007-05-07 724-589-7XXX 7000–7999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C GREENVILLE PA
2007-05-04 724-748-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C BLACKTOWN PA
2007-05-02 724-219-6XXX 6000–6999Assigned ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C GREENSBURG PA

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.