Summary
- Hostname
- —
- ASN
- —
- Organization
- Zayo Bandwidth
- Network
- ZAYO-CCF-45-42-56-0
- Range
- 45.42.56.0 - 45.42.63.255
- /24 block
- 45.42.56.0/24
- Country
- US
- Blacklists
- 0 of 14
- Abuse contact
- [email protected]
Presence of 45.42.56.3 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 45.42.56.3
#
# 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: 45.42.56.0 - 45.42.63.255
CIDR: 45.42.56.0/21
NetName: ZAYO-CCF-45-42-56-0
NetHandle: NET-45-42-56-0-1
Parent: NET45 (NET-45-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: Zayo Bandwidth (ZAYOB)
RegDate: 2015-02-13
Updated: 2026-06-01
Ref: https://rdap.arin.net/registry/ip/45.42.56.0
OrgName: Zayo Bandwidth
OrgId: ZAYOB
Address: 1401 Wynkoop St.
Address: #500
City: Denver
StateProv: CO
PostalCode: 80202
Country: US
RegDate: 2007-10-12
Updated: 2024-11-25
Ref: https://rdap.arin.net/registry/entity/ZAYOB
OrgTechHandle: ZIE-ARIN
OrgTechName: Zayo IP Engineering
OrgTechPhone: +1-866-236-2824
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/ZIE-ARIN
OrgAbuseHandle: ABUSE5675-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-866-236-2824
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE5675-ARIN
OrgNOCHandle: ZIE-ARIN
OrgNOCName: Zayo IP Engineering
OrgNOCPhone: +1-866-236-2824
OrgNOCEmail: [email protected]
OrgNOCRef: https://rdap.arin.net/registry/entity/ZIE-ARIN
# end
# start
NetRange: 45.42.56.0 - 45.42.56.255
CIDR: 45.42.56.0/24
NetName: FPLFI-WHOLECARRI-DIA-112901-1
NetHandle: NET-45-42-56-0-2
Parent: ZAYO-CCF-45-42-56-0 (NET-45-42-56-0-1)
NetType: Reassigned
OriginAS:
Organization: Mednax Services, Inc. (PMG-44)
RegDate: 2015-03-24
Updated: 2019-09-10
Ref: https://rdap.arin.net/registry/ip/45.42.56.0
OrgName: Mednax Services, Inc.
OrgId: PMG-44
Address: 1301 CONCORD TERRACE
City: SUNRISE
StateProv: FL
PostalCode: 33323
Country: US
RegDate: 2000-09-05
Updated: 2025-07-16
Ref: https://rdap.arin.net/registry/entity/PMG-44
OrgTechHandle: CRR7-ARIN
OrgTechName: Rodriguez, Carlos Rafael
OrgTechPhone: +1-800-243-3839
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/CRR7-ARIN
OrgAbuseHandle: OLIVE194-ARIN
OrgAbuseName: Oliver, Pedro
OrgAbusePhone: +1-800-243-3839
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/OLIVE194-ARIN
OrgNOCHandle: CRR7-ARIN
OrgNOCName: Rodriguez, Carlos Rafael
OrgNOCPhone: +1-800-243-3839
OrgNOCEmail: [email protected]
OrgNOCRef: https://rdap.arin.net/registry/entity/CRR7-ARIN
OrgTechHandle: OLIVE194-ARIN
OrgTechName: Oliver, Pedro
OrgTechPhone: +1-800-243-3839
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/OLIVE194-ARIN
OrgNOCHandle: VOLTE15-ARIN
OrgNOCName: Volter, John
OrgNOCPhone: +1-800-243-3839
OrgNOCEmail: [email protected]
OrgNOCRef: https://rdap.arin.net/registry/entity/VOLTE15-ARIN
OrgRoutingHandle: CRR7-ARIN
OrgRoutingName: Rodriguez, Carlos Rafael
OrgRoutingPhone: +1-800-243-3839
OrgRoutingEmail: [email protected]
OrgRoutingRef: https://rdap.arin.net/registry/entity/CRR7-ARIN
OrgRoutingHandle: VOLTE15-ARIN
OrgRoutingName: Volter, John
OrgRoutingPhone: +1-800-243-3839
OrgRoutingEmail: [email protected]
OrgRoutingRef: https://rdap.arin.net/registry/entity/VOLTE15-ARIN
OrgDNSHandle: CRR7-ARIN
OrgDNSName: Rodriguez, Carlos Rafael
OrgDNSPhone: +1-800-243-3839
OrgDNSEmail: [email protected]
OrgDNSRef: https://rdap.arin.net/registry/entity/CRR7-ARIN
OrgTechHandle: VOLTE15-ARIN
OrgTechName: Volter, John
OrgTechPhone: +1-800-243-3839
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/VOLTE15-ARIN
OrgAbuseHandle: VOLTE15-ARIN
OrgAbuseName: Volter, John
OrgAbusePhone: +1-800-243-3839
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/VOLTE15-ARIN
OrgAbuseHandle: CRR7-ARIN
OrgAbuseName: Rodriguez, Carlos Rafael
OrgAbusePhone: +1-800-243-3839
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/CRR7-ARIN
OrgDNSHandle: VOLTE15-ARIN
OrgDNSName: Volter, John
OrgDNSPhone: +1-800-243-3839
OrgDNSEmail: [email protected]
OrgDNSRef: https://rdap.arin.net/registry/entity/VOLTE15-ARIN
RTechHandle: MILZS1-ARIN
RTechName: MIlz, Sharon
RTechPhone: +1-954-839-2071
RTechEmail: [email protected]
RTechRef: https://rdap.arin.net/registry/entity/MILZS1-ARIN
RAbuseHandle: MILZS1-ARIN
RAbuseName: MIlz, Sharon
RAbusePhone: +1-954-839-2071
RAbuseEmail: [email protected]
RAbuseRef: https://rdap.arin.net/registry/entity/MILZS1-ARIN
RNOCHandle: MILZS1-ARIN
RNOCName: MIlz, Sharon
RNOCPhone: +1-954-839-2071
RNOCEmail: [email protected]
RNOCRef: https://rdap.arin.net/registry/entity/MILZS1-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 45.42.56.3.
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 45.42.56.3: 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