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
SUNCOM DBA T-MOBILE USA 99
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
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
2007-07-25 787-500 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 RIO GRANDE 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
2006-10-16 787-974 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE 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
2005-11-03 787-629 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2005-09-29 787-901 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2005-09-26 787-341 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2005-09-26 787-678 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2005-04-21 787-909 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2005-04-19 787-702 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2005-04-19 787-951 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 MAYAGUEZ PR
2005-01-04 787-662 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2004-12-03 787-560 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2004-12-03 787-619 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2004-10-19 787-606 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GUAYANILLA PR
2004-10-04 787-673 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2004-06-24 787-674 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2004-06-01 787-595 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2004-05-28 787-346 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2004-05-18 787-601 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2004-05-05 787-463 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2004-04-19 787-566 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2004-03-02 787-461 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2004-02-02 787-459 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2004-01-28 787-452 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2004-01-28 787-478 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2003-12-22 787-556 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2003-12-18 787-359 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2003-12-18 787-546 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2003-12-08 787-677 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2003-09-22 787-454 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ARECIBO PR
2003-07-18 787-948 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2003-02-18 787-671 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2002-10-30 787-587 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2002-09-04 787-667 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2002-03-15 787-529 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE 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

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.