NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 630
T-MOBILE USA, INC. 76
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
— 630-479 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 630-514 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-656 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LOMBARD IL
— 630-660 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-667 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-669 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 630-670 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-673 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 630-674 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 630-675 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ROSELLE IL
— 630-677 4XXX which blocks → T-MOBILE USA, INC. 6529 GENEVA IL
— 630-697 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-728 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-742 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NAPERVILLE IL
— 630-745 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 630-747 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-774 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-781 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-816 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 630-865 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-886 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-918 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-923 0XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 WHEATON IL
— 630-926 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 630-930 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 ELMHURST IL
— 630-965 not yet reported which blocks → T-MOBILE USA, INC. 6529 BARTLETT IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.