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 815
AERO NORTH COMMUNICATIONS, INC. - IL 43
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
2006-07-18 815-309 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F SHANNON IL
2006-07-18 815-952 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F LANARK IL
2003-05-27 815-619 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F ROCKTON IL
2003-05-27 815-696 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F ROSCOE IL
2003-05-27 815-890 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F NEWMILFORD IL
2001-09-28 815-912 0XXX2XXX · 2 holders which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F BELVIDERE IL
2001-07-24 815-896 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F SHIRLAND IL
2001-06-25 815-891 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F WINNEBAGO IL
2001-03-22 815-803 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F BYRON IL
2001-02-23 815-898 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F MASSBACH IL
— 815-350 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F FRANKLIGRV IL
— 815-360 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F SUBLETTE IL
— 815-574 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F HARMON IL
— 815-576 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F POLO IL
— 815-583 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F MORRISON IL
— 815-798 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F MILLEDGEVL IL
— 815-801 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F FREEPORT IL
— 815-804 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F PECATONICA IL
— 815-805 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F DURAND IL
— 815-807 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F GERMAN VLY IL
— 815-808 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F WINSLOW IL
— 815-809 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F LENA IL
— 815-810 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F PEARL CITY IL
— 815-812 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F DAKOTA IL
— 815-813 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F APPLERIVER IL
— 815-816 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F CEDARVILLE IL
— 815-817 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F HANOVER IL
— 815-818 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F WARREN IL
— 815-819 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F ORANGEVL IL
— 815-820 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F ELIZABETH IL
— 815-829 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F CHADWICK IL
— 815-831 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F DAVIS IL
— 815-833 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F MCCONNELL IL
— 815-835 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F DIXON IL
— 815-837 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F FORRESTON IL
— 815-840 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F STOCKTON IL
— 815-841 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F MT MORRIS IL
— 815-843 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F ASHTON IL
— 815-850 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F SEWARD IL
— 815-852 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F SCALESMOND IL
— 815-917 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F ROCHELLE IL
— 815-924 not yet reported which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F PROPHETSTN IL
— 815-951 1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → AERO NORTH COMMUNICATIONS, INC. - IL 443F AMBOY IL

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.