Data as of Nov 15, 2026
173.211.57.0/24
No anonymizer space · no proxy exits in 30 daysMOD Mission Critical, LLC · space held by Colocation America Corporation
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Holder | RPKI |
|---|---|---|---|---|---|
| 173.211.0.0/17 since Aug 2011 | AS21769 | Hosting | IP broker IPXO (part) | Colocation America Corporation |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 173.211.0.0/17 | 32,768 | CAC-BLOCK7 | Colocation America Corporation (CAC-89) · US | Direct Allocation | Oct 5, 2009 | Abuse@ |
| └ 173.211.56.0/21 | 2,048 | MOD-MISSION-CRITICAL | MOD Mission Critical (C06328844) · US | Reassigned | Feb 10, 2017 | Abuse@ via CAC-BLOCK7 |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
IPv4 market
Holder
- Organization
- Colocation America Corporation
- Handle
- CAC-89
- Range
- 173.
211. 0. 0/ 17 - Registration type
- Direct Allocation
- Record created
- Oct 5, 2009
Origin network
AS54103
US
- Name
- MOD Mission Critical, LLC
- Type
- Hosting
- Registered
- May 6, 2015
- Domain
- modmc.net
- Website
- www.modmc.net
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Rotating
- First seen
- Feb 2017
- Current origin since
- Feb 2024 · 2.7 yr
- Origin networks
- 2
- Last change of origin
- Feb 2024
Recorded history
History
- Handoffs
- 2
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 173.211.56.0/21 | AS54103 | /24 | ARIN | RPKI valid |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS54103 | RADB | MODMC-SanJoseProxy registered route object | MAINT-AS54103 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 173.
211. 56. 0/ 21 - Netname
- MOD-MISSION-CRITICAL
- Registrant
- MOD Mission Critical
- Organization
- MOD Mission Critical (C06328844)
- Type
- Reassigned
- Handle
- NET-173-211-56-0-1
- Parent
- NET-173-211-0-0-1
- Created
- Feb 10, 2017
- RIR
- ARIN
- Country
- US
- Delegated
- Oct 5, 2009
- Status
- assigned
Report abuse
Abuse contact
- Abuse@
colocationamerica. com - Name
- Abuse
- Phone
- +1-800-296-8915
- Handle
- ABUSE7705-ARIN