NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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 812
SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 16
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
— 812-383 1XXX2XXX3XXX · 3 holders which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 HYMERA IN
— 812-658 7XXX which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 LYONS IN
— 812-659 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 LYONS IN
— 812-823 6XXX which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 SMITHVILLE IN
— 812-824 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 SMITHVILLE IN
— 812-825 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 STANFORD IN
— 812-826 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 STANFORD IN
— 812-837 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 LAKEMONROE IN
— 812-851 none assigned yet which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 GRIFFIN IN
— 812-862 4XXX which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 OWENSBURG IN
— 812-863 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 OWENSBURG IN
— 812-876 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 ELLETTSVL IN
— 812-879 none assigned yet which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 GOSPORT IN
— 812-935 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 ELLETTSVL IN
— 812-936 not yet reported which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 FRENCHLICK IN
— 812-938 none assigned yet which blocks → SMITHVILLE COMM., INC DBA SMITHVILLE TELEPHONE CO. 0818 FRENCHLICK IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.