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Data as of Nov 9, 2026

204.194.28.0/22

1 anonymizer address · 0.10% · Tor exit

Carnegie Mellon University

Announcement
this exact prefix
No RPKI
Announced by
AS9
Type
Business
>99% of it
IPv4 market

Path

1 · Holder
Carnegie Mellon University
record created Dec 2, 1994
2 · Leased from
not leased
3 · Announced by
AS9 Carnegie Mellon University
since May 2005 · 21.5 yr ago
4 · Use
named Tor
Business

Operators, sellers and brokers

Tor

NameParentIn 204.194.28.0/22/24s
TorThe Tor Project
10.10%
1

Lineage

How this block came to its use, oldest first. The whole IPv4 market →

204.194.28.0/22

From the registry to its use

  1. Dec 2, 1994
    Registry record
    Carnegie Mellon University
    Direct Allocation (legacy, pre-1997)
    204.194.28.0/22
  2. May 9, 2005– today
    Announced
    AS9 Carnegie Mellon University
    Education
  3. Oct 17, 2018
    Route object
    AS17054 Expedient
    RADB route object for AS17054 Expedient, maintainer MAINT-RR
  4. Apr 4, 2022
    Route object
    AS9 Carnegie Mellon University
    ALTDB route object for AS9 Carnegie Mellon University, maintainer MAINT-AS7034
  5. Jun 28, 2024
    Route object
    AS9 Carnegie Mellon University
    RADB route object for AS9 Carnegie Mellon University, maintainer MAINT-AS5050
  6. today
    Used
    Tor
    Tor

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

1,024 addresses
TypeAddressesShareRanges
Business1,023>99%2
Tor exitanonymizer10.10%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS9

US
Name
Carnegie Mellon University
Type
Education
Registered
Apr 17, 1984
Domain
cmu.edu
Industry
Colleges, Universities, and Professional Schools
Spamhaus ASN-DROP
not listed
Tor exits
1