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 787
PUERTO RICO TELEPHONE COMPANY, INC. 50
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2009-08-06 787-465-3XXX 3000–3999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C NAGUABO PR
2009-08-06 787-928-3XXX 3000–3999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C PENUELAS PR
2009-08-04 787-937-3XXX 3000–3999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C SANLORENZO PR
2009-07-16 787-931-1XXX 1000–1999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C AGUADILLA PR
2009-05-20 787-966-2XXX 2000–2999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2009-05-07 787-966-1XXX 1000–1999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-12-23 787-679-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C PUEBLOVIEJ PR
2008-07-11 787-480-0XXX 0000–0999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-1XXX 1000–1999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-2XXX 2000–2999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-3XXX 3000–3999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-4XXX 4000–4999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-5XXX 5000–5999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-6XXX 6000–6999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-7XXX 7000–7999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-480-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-07-11 787-992-3XXX 3000–3999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C YAUCO PR
2008-05-13 787-483-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C NARANJITO PR
2008-05-08 787-680-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C ARECIBO PR
2008-05-08 787-921-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C MANATI PR
2008-05-05 787-592-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C GUAYAMA PR
2008-05-05 787-966-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-05-05 787-995-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-03-25 787-694-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C CAYEY PR
2008-03-25 787-986-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C MAYAGUEZ PR
2008-03-25 787-987-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C PONCE PR
2008-03-17 787-230-4XXX 4000–4999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C TOA BAJA PR
2008-03-17 787-230-5XXX 5000–5999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C TOA BAJA PR
2008-03-11 787-500-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C RIO GRANDE PR
2008-02-07 787-931-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C AGUADILLA PR
2004-11-30 787-524-0XXX 0000–0999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-1XXX 1000–1999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-2XXX 2000–2999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-3XXX 3000–3999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-4XXX 4000–4999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-5XXX 5000–5999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-6XXX 6000–6999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-7XXX 7000–7999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-11-30 787-524-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2004-10-13 787-227-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C NARANJITO PR
2004-10-13 787-355-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C LUQUILLO PR
2004-10-13 787-609-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C ISABELA PR
2004-10-13 787-712-7XXX 7000–7999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C GURABO PR
2004-10-13 787-794-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C TOA BAJA PR
2004-10-13 787-808-7XXX 7000–7999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C LAJAS PR
2004-10-13 787-814-9XXX 9000–9999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C UTUADO PR
2004-10-13 787-915-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C VEGA ALTA PR
2004-10-13 787-992-8XXX 8000–8999Assigned PUERTO RICO TELEPHONE COMPANY, INC. 667C YAUCO PR

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.