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
2023-03-29 787-939 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2022-05-13 787-990 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2022-02-14 787-456 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2011-11-15 787-980 0–9 XXXall 10 · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J CAROLINA PR
2009-08-20 787-985 0–9 XXXall 10 · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 ISLA VERDE PR
2009-07-28 787-669 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2008-11-05 787-666 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2008-10-31 787-513 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2008-10-21 787-800 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2008-10-21 787-989 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2008-09-15 787-600 0–9 XXXall 10 · 2 holders which blocks → PUERTO RICO TEL. CO. 3201 PUEBLOVIEJ PR
2008-07-11 787-480 0–9 XXXwhole prefix which blocks → PUERTO RICO TELEPHONE COMPANY, INC. 667C BAYAMONNOR PR
2008-05-01 787-900 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2007-09-17 787-476 0–9 XXXall 10 · 5 holders which blocks → NEUTRAL TANDEM - PR 559F SAN GERMAN PR
2007-09-17 787-965 0–9 XXXall 10 · 6 holders which blocks → NEUTRAL TANDEM - PR 559F VEGA BAJA PR
2007-09-17 787-973 0–9 XXXall 10 · 5 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J GUAYANILLA PR
2007-09-05 787-437 0–9 XXXall 10 · 4 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 JAYUYA PR
2007-09-05 787-482 0–9 XXXall 10 · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 SALINAS PR
2007-09-05 787-483 0–9 XXXall 10 · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 NARANJITO PR
2007-09-05 787-663 0–9 XXXall 10 · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 CIALES PR
2007-09-05 787-913 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 JUANA DIAZ PR
2007-09-05 787-956 0–9 XXXall 10 · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 LARES PR
2007-09-04 787-558 0–9 XXXall 10 · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 SAN ISABEL PR
2007-08-22 787-481 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-07-25 787-468 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G FAJARDO PR
2007-07-25 787-500 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 RIO GRANDE PR
2007-07-16 787-987 0–9 XXXall 10 · 6 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J PONCE PR
2007-05-14 787-592 0–9 XXXall 10 · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 GUAYAMA PR
2007-05-14 787-680 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 ARECIBO PR
2007-05-14 787-694 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 CAYEY PR
2007-05-14 787-921 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 MANATI PR
2007-05-14 787-931 0–9 XXXall 10 · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 AGUADILLA PR
2007-02-01 787-916 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 8305 JUNCOS PR
2007-01-31 787-710 0–9 XXXall 10 · 4 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 CAROLINA PR
2007-01-19 787-230 0–9 XXXall 10 · 5 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 TOA BAJA PR
2007-01-19 787-665 0–9 XXXall 10 · 4 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 DORADO PR
2007-01-19 787-936 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 CATANO PR
2006-11-29 787-679 0–9 XXXall 10 · 3 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 PUEBLOVIEJ PR
2006-11-29 787-919 0–9 XXXall 10 · 4 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 SANTURCE PR
2006-11-01 787-395 0XXX1XXX2XXX3XXX5XXX7XXX9XXX · 4 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 BAYAMONNOR PR
2006-11-01 787-902 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2006-11-01 787-932 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2006-10-25 787-945 0–9 XXXall 10 · 6 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 SANTURCEES PR
2006-10-24 787-966 0–9 XXXall 10 · 4 holders which blocks → WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 BAYAMONNOR PR
2006-10-16 787-974 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2006-09-20 787-998 0–9 XXXall 10 · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 8305 SANTURCE PR
2006-05-31 787-907 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAGUAS PR
2006-05-23 787-709 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2006-05-19 787-904 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2006-04-20 787-905 0–9 XXXall 10 · 3 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS 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.