Data as of Nov 6, 2026
199.33.161.0/24
No anonymizer space · no proxy exits in 30 daysCogent Communications, LLC · space held by Aspen Technology, Inc.
Network & registry
Origin network
AS174
US
- Name
- Cogent Communications, LLC
- Type
- Internet provider
- Registered
- May 16, 1996
- Domain
- cogentco.com
- Website
- www.cogentco.com/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 1,658
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Dec 2013 · 13 yr
- Origin networks
- 3
- Last change of origin
- Dec 2013
Recorded history
History
- Handoffs
- 2
Whois
Registration for this announcement
- Range
- 199.
33. 159. 0 - 199. 33. 163. 255 - Netname
- NETBLK-ASPNET
- Registrant
- Aspen Technology, Inc.
- Organization
- Aspen Technology, Inc. (ASPENT)
- Org address
- 200 Wheeler Road, Burlington, MA, 01803
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-199-33-159-0-1
- Parent
- NET-199-0-0-0-0
- Created
- Jan 11, 1994
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 11, 1994
- Status
- assigned
Report abuse
Abuse contact
- is.
network. admins@ aspentech. com - Name
- IS Network Admins
- Phone
- +1-781-221-6400
- Handle
- INA29-ARIN