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
NATURAL G.C. INC. - PR 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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
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
2013-05-15 939-709 0XXX1XXX · 2 holders which blocks → NATURAL G.C. INC. - PR 985G RIOPIEDRAS 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.