NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 787
PUERTO RICO TEL. CO. 249
LIBERTY MOBILE PUERTO RICO INC. 238
SUNCOM DBA T-MOBILE USA 99
PUERTO RICO TELCO DBA CLARO PUERTO RICO 86
OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-01-11 787-477 not yet reported which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2002-01-11 787-590 not yet reported which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2001-11-30 787-565 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-10-31 787-597 8XXX9XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2001-10-11 787-526 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-10-11 787-942 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-10-01 787-458 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2001-09-12 787-543 0XXX4XXX · 2 holders which blocks → METROPCS, INC. 5562 GUAYANILLA PR
2001-09-12 787-557 0XXX4XXX5XXX which blocks → METROPCS, INC. 5562 CAYEY PR
2001-09-12 787-929 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2001-08-07 787-431 none assigned yet which blocks → METROPCS, INC. 5562 AGUADILLA PR
2001-08-07 787-538 5XXX7XXX8XXX which blocks → METROPCS, INC. 5562 SAN GERMAN PR
2001-07-18 787-553 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2001-07-09 787-549 0XXX2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2001-07-09 787-550 none assigned yet which blocks → METROPCS, INC. 5562 RIO GRANDE PR
2001-06-20 787-229 4XXX6XXX8XXX · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 8305 ANASCO PR
2001-06-20 787-345 0XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → METROPCS, INC. 5562 VEGA BAJA PR
2001-06-20 787-444 none assigned yet which blocks → METROPCS, INC. 5562 SANTURCE PR
2001-06-20 787-914 none assigned yet which blocks → METROPCS, INC. 5562 HUMACAO PR
2001-05-18 787-435 5XXX7XXX8XXX which blocks → METROPCS, INC. 5562 FAJARDO PR
2001-05-18 787-438 not yet reported which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2001-05-18 787-464 0XXX8XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2001-05-18 787-661 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-05-18 787-920 0XXX3XXX5XXX6XXX7XXX8XXX which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2001-04-20 787-369 3XXX8XXX · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 8305 MOROVIS PR
2001-04-20 787-453 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
2001-04-20 787-579 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 TRUJILLOAL PR
2001-03-16 787-320 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
2001-03-16 787-356 none assigned yet which blocks → METROPCS, INC. 5562 ARECIBO PR
2001-03-16 787-432 none assigned yet which blocks → METROPCS, INC. 5562 PONCE PR
2001-02-12 787-299 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-02-12 787-367 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-02-12 787-469 none assigned yet which blocks → METROPCS, INC. 5562 CAGUAS PR
2001-02-12 787-525 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-01-15 787-358 none assigned yet which blocks → METROPCS, INC. 5562 SANTURCE PR
2001-01-15 787-410 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-01-15 787-923 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2001-01-12 787-475 not yet reported which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2001-01-12 787-548 not yet reported which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2001-01-11 787-297 none assigned yet which blocks → METROPCS, INC. 5562 SANTURCE PR
— 787-200 0–9 XXXall 10 · 3 holders which blocks → LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G RIOPIEDRAS PR
— 787-201 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 ARECIBO PR
— 787-202 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 PONCE PR
— 787-203 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 CAGUAS PR
— 787-204 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 GUAYAMA PR
— 787-205 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 CAYEY PR
— 787-206 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 HUMACAO PR
— 787-207 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
— 787-208 not yet reported which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 SANTURCE PR
— 787-209 not yet reported which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.