Summary
- Hostname
- —
- ASN
- —
- Organization
- University of California - Office of the President
- Network
- UCSD-NET-169-228
- Range
- 169.229.0.0 - 169.233.255.255
- /24 block
- 169.233.78.0/24
- Country
- US
- Blacklists
- 0 of 14
- Abuse contact
- [email protected]
Presence of 169.233.78.255 in blacklists
| List | Status |
|---|---|
| zen.spamhaus.org | Not listed |
| bl.spamcop.net | Not listed |
| black.junkemailfilter.com | Not listed |
| multi.surbl.org | Not listed |
| dnsbl.sorbs.net | Not listed |
| b.barracudacentral.org | Not listed |
| dnsbl.tornevall.org | Not listed |
| dnsbl.httpbl.org | Not listed |
| dnsbl-1.uceprotect.net | Not listed |
| dnsbl-2.uceprotect.net | Not listed |
| dnsbl-3.uceprotect.net | Not listed |
| v4.fullbogons.cymru.com | Not listed |
| bl.blocklist.de | Not listed |
| rbl.blockedservers.com | Not listed |
What is a blacklist (RBL)?
An RBL (Real-time Blackhole List), also known as a DNSBL (DNS-based Blackhole List), is a mechanism used to fight spam by blocking e-mails coming from sources known to send spam. RBLs are databases listing the IP addresses deemed responsible for sending unsolicited e-mail. Mail server administrators use these lists to filter incoming e-mails by checking whether the sender's IP address appears in one or more RBLs. If it does, the e-mail may be rejected or subjected to additional checks.
There are different types of RBLs, each with its own criteria for listing IP addresses. Some focus on IP addresses that send spam directly, while others list IP addresses belonging to networks known to host computers infected with malware and used as bots to send spam. RBL operators keep their lists up to date through automatic and manual contributions, and IP address owners can often request removal from a list if they believe the listing is unjustified.
WHOIS data for 169.233.78.255
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
# start
NetRange: 169.229.0.0 - 169.233.255.255
CIDR: 169.230.0.0/15, 169.232.0.0/15, 169.229.0.0/16
NetName: UCSD-NET-169-228
NetHandle: NET-169-229-0-0-1
Parent: NET169 (NET-169-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: University of California - Office of the President (UCOP-Z)
RegDate: 1995-08-04
Updated: 2021-10-05
Ref: https://rdap.arin.net/registry/ip/169.229.0.0
OrgName: University of California - Office of the President
OrgId: UCOP-Z
Address: Information Technology Services
Address: 1111 Franklin Street
City: Oakland
StateProv: CA
PostalCode: 94607
Country: US
RegDate: 2018-11-01
Updated: 2018-11-01
Ref: https://rdap.arin.net/registry/entity/UCOP-Z
OrgTechHandle: NETWO575-ARIN
OrgTechName: Network Operations
OrgTechPhone: +1-510-987-0363
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/NETWO575-ARIN
OrgAbuseHandle: NETWO575-ARIN
OrgAbuseName: Network Operations
OrgAbusePhone: +1-510-987-0363
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/NETWO575-ARIN
RTechHandle: NETWO576-ARIN
RTechName: Network Operations
RTechPhone: +1-510-987-0534
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/NETWO576-ARIN
RTechHandle: UD14-ORG-ARIN
RTechName: UCNet DNS Administrator
RTechPhone: +1-510-893-9242
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/UD14-ORG-ARIN
RNOCHandle: NETWO575-ARIN
RNOCName: Network Operations
RNOCPhone: +1-510-987-0363
RNOCEmail: [email protected]
RNOCRef: https://rdap.arin.net/registry/entity/NETWO575-ARIN
RAbuseHandle: NETWO577-ARIN
RAbuseName: Network Operations
RAbusePhone: +1-510-987-0534
RAbuseEmail: [email protected]
RAbuseRef: https://rdap.arin.net/registry/entity/NETWO577-ARIN
# end
# start
NetRange: 169.233.0.0 - 169.233.255.255
CIDR: 169.233.0.0/16
NetName: UCSC-169-233-0
NetHandle: NET-169-233-0-0-1
Parent: UCSD-NET-169-228 (NET-169-229-0-0-1)
NetType: Reassigned
OriginAS:
Organization: University of California, Santa Cruz (UCSC)
RegDate: 1997-08-20
Updated: 2025-05-30
Ref: https://rdap.arin.net/registry/ip/169.233.0.0
OrgName: University of California, Santa Cruz
OrgId: UCSC
Address: University of California, Santa Cruz
Address: Information Technology Services
Address: Communications Building
Address: 620 Baskin Circle
City: Santa Cruz
StateProv: CA
PostalCode: 95064
Country: US
RegDate: 1986-03-05
Updated: 2026-06-15
Ref: https://rdap.arin.net/registry/entity/UCSC
OrgTechHandle: UCSCN-ARIN
OrgTechName: Network Operations Center
OrgTechPhone: +1-831-459-2714
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/UCSCN-ARIN
OrgAbuseHandle: UCSCN1-ARIN
OrgAbuseName: UCSC Security
OrgAbusePhone: +1-831-459-2714
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/UCSCN1-ARIN
OrgNOCHandle: UCSCN-ARIN
OrgNOCName: Network Operations Center
OrgNOCPhone: +1-831-459-2714
OrgNOCEmail: [email protected]
OrgNOCRef: https://rdap.arin.net/registry/entity/UCSCN-ARIN
RTechHandle: UCSCN1-ARIN
RTechName: UCSC Security
RTechPhone: +1-831-459-2714
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/UCSCN1-ARIN
# end
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
Related domain names
Domains mentioned in the reverse DNS and the WHOIS of 169.233.78.255.
What is an IP address?
An IP address is a unique identifier on the internet that identifies a server or an internet user. Here the IP address is 169.233.78.255: it may be the unique address used to reach a website, or the unique address of an internet user.
An SMTP server (a server used to send e-mails) must have a reverse DNS record associated with its IP address