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
SUNCOM DBA T-MOBILE USA 655
LIBERTY MOBILE PUERTO RICO INC. 329
LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 165
WORLDNET TELECOMMUNICATIONS, INC. - PR 106
NEUTRAL TANDEM - PR 63
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
2005-11-29 787-674-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-29 787-719-2XXX 2000–2999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 HUMACAO PR
2005-11-29 787-719-3XXX 3000–3999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 HUMACAO PR
2005-11-29 787-719-4XXX 4000–4999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G HUMACAO PR
2005-11-29 787-719-5XXX 5000–5999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G HUMACAO PR
2005-11-29 787-719-6XXX 6000–6999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G HUMACAO PR
2005-11-29 787-961-2XXX 2000–2999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 CAGUAS PR
2005-11-29 787-961-3XXX 3000–3999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G CAGUAS PR
2005-11-29 787-961-4XXX 4000–4999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 CAGUAS PR
2005-11-29 787-961-5XXX 5000–5999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G CAGUAS PR
2005-11-29 787-961-6XXX 6000–6999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G CAGUAS PR
2005-11-29 787-972-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-29 787-993-0XXX 0000–0999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-1XXX 1000–1999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G SANTURCE PR
2005-11-29 787-993-2XXX 2000–2999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-3XXX 3000–3999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-4XXX 4000–4999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-5XXX 5000–5999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G SANTURCE PR
2005-11-29 787-993-6XXX 6000–6999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-7XXX 7000–7999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-8XXX 8000–8999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-29 787-993-9XXX 9000–9999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2005-11-08 787-674-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-04 787-629-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2005-11-04 787-629-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2005-11-04 787-629-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2005-11-03 787-300-0XXX 0000–0999Assigned METROPCS, INC. 5562 SANTURCE PR
2005-11-03 787-300-1XXX 1000–1999Assigned METROPCS, INC. 5562 SANTURCE PR
2005-10-31 787-346-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2005-10-31 787-909-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2005-10-24 787-685-5XXX 5000–5999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2005-10-24 787-685-6XXX 6000–6999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2005-10-24 787-685-7XXX 7000–7999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2005-10-24 787-685-8XXX 8000–8999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2005-10-24 787-685-9XXX 9000–9999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2005-10-18 787-300-7XXX 7000–7999Assigned METROPCS, INC. 5562 SANTURCE PR
2005-10-18 787-300-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-10-06 787-452-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2005-10-06 787-452-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2005-09-29 787-901-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2005-09-29 787-901-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2005-09-28 787-341-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2005-09-28 787-341-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2005-09-27 787-400-0XXX 0000–0999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J GUAYNABO PR
2005-09-27 787-400-1XXX 1000–1999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J GUAYNABO PR
2005-09-27 787-400-2XXX 2000–2999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J GUAYNABO PR
2005-09-27 787-400-3XXX 3000–3999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J GUAYNABO PR
2005-09-27 787-678-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2005-09-27 787-678-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2005-09-27 787-908-0XXX 0000–0999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J BAYAMONSUR 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.