NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 779
STRATUS NETWORKS 35
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
2021-03-18 779-278 0XXX1XXX2XXX4XXX7XXX8XXX · 5 holders which blocks → STRATUS NETWORKS 495J GRANDRIDGE IL
2020-12-10 779-326 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J DWIGHT IL
2020-11-25 779-325 1XXX3XXX5XXX · 3 holders which blocks → STRATUS NETWORKS 495J FRANKLIGRV IL
2020-09-17 779-299 0XXX1XXX2XXX · 3 holders which blocks → STRATUS NETWORKS 495J WENONA IL
2020-09-17 779-304 1XXX3XXX · 2 holders which blocks → STRATUS NETWORKS 495J RUTLAND IL
2020-09-17 779-305 1XXX3XXX5XXX7XXX · 3 holders which blocks → STRATUS NETWORKS 495J REDDICK IL
2020-09-17 779-306 0–9 XXXall 10 · 6 holders which blocks → STRATUS NETWORKS 495J PONTIAC IL
2020-09-17 779-307 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → STRATUS NETWORKS 495J LOSTANT IL
2020-09-17 779-308 0XXX1XXX3XXX · 3 holders which blocks → STRATUS NETWORKS 495J CHATSWORTH IL
2020-09-17 779-310 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → STRATUS NETWORKS 495J NEWMILFORD IL
2020-09-17 779-313 1XXX3XXX8XXX · 3 holders which blocks → STRATUS NETWORKS 495J CHERRY VLY IL
2020-09-17 779-314 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → STRATUS NETWORKS 495J ROCK CUT IL
2020-09-17 779-315 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J ROSCOE IL
2020-09-17 779-316 0XXX1XXX3XXX6XXX8XXX · 4 holders which blocks → STRATUS NETWORKS 495J CRESTON IL
2020-09-17 779-317 1XXX2XXX3XXX8XXX · 3 holders which blocks → STRATUS NETWORKS 495J KIRKLAND IL
2020-09-17 779-318 1XXX3XXX7XXX · 3 holders which blocks → STRATUS NETWORKS 495J MALTA IL
2020-09-17 779-319 0XXX1XXX2XXX3XXX · 4 holders which blocks → STRATUS NETWORKS 495J MAPLE PARK IL
2020-09-17 779-320 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → STRATUS NETWORKS 495J MONROE CTR IL
2020-09-17 779-321 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → STRATUS NETWORKS 495J SHABBONA IL
2020-09-17 779-322 1XXX2XXX3XXX · 3 holders which blocks → STRATUS NETWORKS 495J THOMAS IL
2020-09-08 779-296 1XXX2XXX · 2 holders which blocks → STRATUS NETWORKS 495J LONG POINT IL
2020-09-04 779-291 0XXX1XXX3XXX4XXX5XXX · 4 holders which blocks → STRATUS NETWORKS 495J WONDERLAKE IL
2020-09-04 779-292 0XXX1XXX3XXX4XXX5XXX · 3 holders which blocks → STRATUS NETWORKS 495J ONARGA IL
2020-09-04 779-293 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J NEW LENOX IL
2020-09-04 779-294 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → STRATUS NETWORKS 495J HARDING IL
2020-09-04 779-295 0XXX1XXX2XXX3XXX · 3 holders which blocks → STRATUS NETWORKS 495J MAZON IL
2020-09-02 779-290 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → STRATUS NETWORKS 495J MILFORD IL
2020-08-25 779-280 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → STRATUS NETWORKS 495J DONOVAN IL
2020-08-25 779-282 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → STRATUS NETWORKS 495J MARTINTON IL
2020-08-25 779-283 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → STRATUS NETWORKS 495J RICHMOND IL
2020-08-25 779-284 0XXX1XXX8XXX · 3 holders which blocks → STRATUS NETWORKS 495J SHELDON IL
2020-08-25 779-285 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → STRATUS NETWORKS 495J SHERIDAN IL
2020-08-25 779-286 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → STRATUS NETWORKS 495J SPRING GRV IL
2020-07-28 779-275 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J ROCKFORD IL
2020-07-28 779-276 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J DE KALB IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.