NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 463-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 463-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 463-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 463-950 not yet reported which blocks → IN
— 463-958 not yet reported which blocks → IN
— 463-959 not yet reported which blocks → IN
— 463-976 not yet reported which blocks → IN
— 464-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IL
— 464-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-700 not yet reported which blocks → IL
— 464-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 464-950 not yet reported which blocks → IL
— 464-958 not yet reported which blocks → IL
— 464-959 not yet reported which blocks → IL
— 464-976 not yet reported which blocks → IL
— 465-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 465-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-950 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-958 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-959 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 465-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 469-200 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FRISCO TX
— 469-202 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C CELINA TX
— 469-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 469-218 not yet reported which blocks → ONVOY, LLC - TX 903C RED OAK TX
— 469-220 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 IRVING TX
— 469-221 9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 DALLAS TX
— 469-222 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
— 469-223 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
— 469-224 0XXX1XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - TX 903C DLFTWTARPT TX
— 469-225 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C RED OAK TX
— 469-227 0XXX which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-228 1XXX2XXX3XXX4XXX6XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MAYPEARL TX
— 469-231 not yet reported which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
— 469-232 7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-233 not yet reported which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.