Summary
- Hostname
- —
- ASN
- —
- Organization
- Radford University
- Network
- RU-NET
- Range
- 137.45.0.0 - 137.45.255.255
- /24 block
- 137.45.78.0/24
- Country
- US
- Blacklists
- 0 of 14
- Abuse contact
- [email protected]
Presence of 137.45.78.31 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 137.45.78.31
#
# 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.
#
NetRange: 137.45.0.0 - 137.45.255.255
CIDR: 137.45.0.0/16
NetName: RU-NET
NetHandle: NET-137-45-0-0-1
Parent: NET137 (NET-137-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: Radford University (RADFOR)
RegDate: 1989-10-25
Updated: 2026-09-29
Comment: DMCA and copyright complaints to [email protected].
Ref: https://rdap.arin.net/registry/ip/137.45.0.0
OrgName: Radford University
OrgId: RADFOR
Address: 801 East Main St.
City: Radford
StateProv: VA
PostalCode: 24142
Country: US
RegDate: 1989-01-12
Updated: 2026-08-12
Comment: DMCA and copyright complaints to [email protected].
Ref: https://rdap.arin.net/registry/entity/RADFOR
OrgAbuseHandle: RNA56-ARIN
OrgAbuseName: RU Network Abuse
OrgAbusePhone: +1-540-831-7515
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/RNA56-ARIN
OrgTechHandle: BAILE626-ARIN
OrgTechName: Bailey, Ryan
OrgTechPhone: +1-540-831-7727
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/BAILE626-ARIN
OrgNOCHandle: ROC12-ARIN
OrgNOCName: RU Operations Center
OrgNOCPhone: +1-540-831-5063
OrgNOCEmail: [email protected]
OrgNOCRef: https://rdap.arin.net/registry/entity/ROC12-ARIN
OrgTechHandle: DWB68-ARIN
OrgTechName: Butcher, David W
OrgTechPhone: +1-540-831-5086
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/DWB68-ARIN
OrgTechHandle: WIRTW4-ARIN
OrgTechName: Wirt, William
OrgTechPhone: +1-540-831-7771
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/WIRTW4-ARIN
RNOCHandle: WIRTW4-ARIN
RNOCName: Wirt, William
RNOCPhone: +1-540-831-7771
RNOCEmail: [email protected]
RNOCRef: https://rdap.arin.net/registry/entity/WIRTW4-ARIN
RTechHandle: WIRTW4-ARIN
RTechName: Wirt, William
RTechPhone: +1-540-831-7771
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/WIRTW4-ARIN
#
# 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 137.45.78.31.
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 137.45.78.31: 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