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 939
SUNCOM DBA T-MOBILE USA 121
PUERTO RICO TELCO DBA CLARO PUERTO RICO 87
LIBERTY MOBILE PUERTO RICO INC. 62
LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 27
ONVOY SPECTRUM, LLC 14
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
2020-12-15 939-569 0XXX2XXX5XXX · 3 holders which blocks → NEUTRAL TANDEM - PR 559F OROCOVIS PR
2020-12-15 939-629 2XXX6XXX · 2 holders which blocks → NEUTRAL TANDEM - PR 559F SANTANA PR
2020-12-14 939-369 0XXX2XXX3XXX9XXX · 4 holders which blocks → NEUTRAL TANDEM - PR 559F AGUADA PR
2020-12-14 939-739 0–9 XXXall 10 · 5 holders which blocks → NEUTRAL TANDEM - PR 559F TOA ALTA PR
2020-12-10 939-407 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-01 939-406 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-12-01 939-409 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-11-04 939-600 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEUTRAL TANDEM - PR 559F PUEBLOVIEJ PR
2020-11-04 939-610 0–9 XXXall 10 · 3 holders which blocks → NEUTRAL TANDEM - PR 559F BAYAMONSUR PR
2020-09-01 939-395 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2019-09-19 939-302 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2019-09-19 939-304 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2019-09-13 939-301 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2019-08-12 939-298 0XXX2XXX3XXX4XXX · 4 holders which blocks → LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J RAMEY PR
2019-01-03 939-300 0XXX1XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → NATURAL G.C. INC. - PR 985G SANLORENZO PR
2019-01-03 939-393 2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → NATURAL G.C. INC. - PR 985G BARCELONTA PR
2019-01-03 939-800 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NATURAL G.C. INC. - PR 985G ADJUNTAS PR
2018-12-17 939-444 0XXX1XXX2XXX3XXX4XXX5XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G ROOSEVLTRD PR
2018-12-17 939-666 0XXX1XXX2XXX3XXX6XXX7XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G SANSBSTIAN PR
2018-12-17 939-888 0XXX1XXX3XXX7XXX8XXX · 5 holders which blocks → NATURAL G.C. INC. - PR 985G LASPIEDRAS PR
2018-12-17 939-900 0–9 XXXall 10 · 3 holders which blocks → NATURAL G.C. INC. - PR 985G PONCE PR
2018-12-17 939-999 0XXX1XXX2XXX3XXX8XXX9XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G AGUASBUNAS PR
2018-12-04 939-296 0XXX1XXX2XXX3XXX9XXX · 5 holders which blocks → NATURAL G.C. INC. - PR 985G JUNCOS PR
2018-12-04 939-412 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → NATURAL G.C. INC. - PR 985G LEVITTOWN PR
2018-12-04 939-445 0XXX1XXX3XXX4XXX5XXX7XXX · 6 holders which blocks → NATURAL G.C. INC. - PR 985G GUANICA PR
2018-12-04 939-592 0–9 XXXall 10 · 3 holders which blocks → NATURAL G.C. INC. - PR 985G BAYAMONSUR PR
2018-12-04 939-985 0XXX2XXX8XXX · 3 holders which blocks → NATURAL G.C. INC. - PR 985G COMERIO PR
2018-07-30 939-294 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2018-07-30 939-295 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-07-24 939-237 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-07-24 939-293 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-07-19 939-236 0XXX2XXX3XXX6XXX8XXX · 5 holders which blocks → LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J RIOPIEDRAS PR
2018-07-09 939-210 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAGUAS PR
2018-06-14 939-577 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-05-09 939-808 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 TRUJILLOAL PR
2018-05-02 939-745 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-04-26 939-652 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2018-04-26 939-845 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2018-04-17 939-441 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-04-17 939-478 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2018-04-12 939-606 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2018-04-09 939-344 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2018-03-15 939-588 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2018-03-15 939-625 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2018-02-16 939-464 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-450 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-451 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-454 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-456 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-457 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR 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.