NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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 787
LUMEN TECHNOLOGIES PUERTO RICO, LLC 33
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
2023-06-13 787-425-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYNABO PR
2022-11-16 787-987-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J PONCE PR
2021-04-26 787-558-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SAN ISABEL PR
2021-04-26 787-592-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYAMA PR
2020-02-13 787-230-9XXX 9000–9999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J TOA BAJA PR
2020-02-13 787-425-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYNABO PR
2020-02-13 787-434-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J CIDRA PR
2020-02-13 787-468-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J FAJARDO PR
2020-02-13 787-476-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SAN GERMAN PR
2020-02-13 787-482-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SALINAS PR
2020-02-13 787-483-6XXX 6000–6999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J NARANJITO PR
2020-02-13 787-558-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SAN ISABEL PR
2020-02-13 787-589-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J AGUADA PR
2020-02-13 787-592-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYAMA PR
2020-02-13 787-606-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYANILLA PR
2020-02-13 787-663-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J CIALES PR
2020-02-13 787-665-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J DORADO PR
2020-02-13 787-694-6XXX 6000–6999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J CAYEY PR
2020-02-13 787-742-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J CULEBRA PR
2020-02-13 787-803-9XXX 9000–9999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J COAMO PR
2020-02-13 787-827-6XXX 6000–6999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J LAS MARIAS PR
2020-02-13 787-913-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J JUANA DIAZ PR
2020-02-13 787-921-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J MANATI PR
2020-02-13 787-936-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J CATANO PR
2020-02-13 787-937-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SANLORENZO PR
2020-02-13 787-945-3XXX 3000–3999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SANTURCEES PR
2020-02-13 787-953-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J YABUCOA PR
2020-02-13 787-956-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J LARES PR
2020-02-13 787-965-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J VEGA BAJA PR
2020-02-13 787-968-3XXX 3000–3999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J VIEQUES PR
2020-02-13 787-985-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J ISLA VERDE PR
2020-02-13 787-991-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J AIBONITO PR
2019-01-23 787-987-6XXX 6000–6999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J PONCE PR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.