[ IP ]

147.72.252.240

#122,290Top IPs · 1M scope0 domains

Overview

Top IPs list rank

1M: #122,290(34 observation hits)

Hosted domains (90 days): 0
Hosted domains (all time): 0
First seen: Mon Jul 13 2026 04:05:26 GM
Last seen: Fri Aug 28 2026 19:33:08 GM
PDNS hits (90 days): 34
Country: US
Snapshot: 1970-01-01

Network operated by Pittsburgh Supercomputing Center (PSC-Z) (PSC-PPP-SUBNET).

List rank history

30 daily snapshots in the Top IPs list (1M scope). Lower rank numbers indicate more accumulated passive-DNS observation evidence.

Whois — 147.72.252.240

Netname: PSC-PPP-SUBNET
Organization: Pittsburgh Supercomputing Center (PSC-Z)
Country: US
ASN: —

Full whois record


#
# 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:       147.72.0.0 - 147.72.255.255
CIDR:           147.72.0.0/16
NetName:        PSC-PPP-SUBNET
NetHandle:      NET-147-72-0-0-1
Parent:         NET147 (NET-147-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Pittsburgh Supercomputing Center (PSC-Z)
RegDate:        1991-07-05
Updated:        2012-04-02
Ref:            https://rdap.arin.net/registry/ip/147.72.0.0


OrgName:        Pittsburgh Supercomputing Center
OrgId:          PSC-Z
Address:        300 S Craig St
City:           Pittsburgh
StateProv:      PA
PostalCode:     15213
Country:        US
RegDate:        2008-05-29
Updated:        2022-04-27
Ref:            https://rdap.arin.net/registry/entity/PSC-Z


OrgTechHandle: SC274-ARIN
OrgTechName:   Cunningham, Stephen 
OrgTechPhone:  +1-412-268-4960 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/SC274-ARIN

OrgAbuseHandle: PN-ORG-ARIN
OrgAbuseName:   Pittsburgh Supercomputing Center
OrgAbusePhone:  +1-412-268-4960 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/PN-ORG-ARIN

OrgTechHandle: PN-ORG-ARIN
OrgTechName:   Pittsburgh Supercomputing Center
OrgTechPhone:  +1-412-268-4960 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/PN-ORG-ARIN

OrgAbuseHandle: SC274-ARIN
OrgAbuseName:   Cunningham, Stephen 
OrgAbusePhone:  +1-412-268-4960 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SC274-ARIN

RTechHandle: SC274-ARIN
RTechName:   Cunningham, Stephen 
RTechPhone:  +1-412-268-4960 
RTechEmail:  [email protected]
RTechRef:    https://rdap.arin.net/registry/entity/SC274-ARIN

# end


# start

NetRange:       147.72.252.0 - 147.72.255.255
CIDR:           147.72.252.0/22
NetName:        PSC-BLK72-252-22
NetHandle:      NET-147-72-252-0-1
Parent:         PSC-PPP-SUBNET (NET-147-72-0-0-1)
NetType:        Reassigned
OriginAS:       
Organization:   Software Engineering Institute (CERT-1)
RegDate:        2015-06-24
Updated:        2015-06-24
Ref:            https://rdap.arin.net/registry/ip/147.72.252.0


OrgName:        Software Engineering Institute
OrgId:          CERT-1
Address:        Software Engineering Institute
Address:        Carnegie Mellon University
Address:        4500 Fifth Avenue
City:           Pittsburgh
StateProv:      PA
PostalCode:     15213
Country:        US
RegDate:        1991-01-11
Updated:        2014-08-13
Ref:            https://rdap.arin.net/registry/entity/CERT-1


OrgNOCHandle: SIT6-ARIN
OrgNOCName:   SEI Information Technology
OrgNOCPhone:  +1-412-268-3416 
OrgNOCEmail:  [email protected]
OrgNOCRef:    https://rdap.arin.net/registry/entity/SIT6-ARIN

OrgTechHandle: SIT6-ARIN
OrgTechName:   SEI Information Technology
OrgTechPhone:  +1-412-268-3416 
OrgTechEmail:  [email protected]
OrgTechRef:    https://rdap.arin.net/registry/entity/SIT6-ARIN

OrgAbuseHandle: SIT6-ARIN
OrgAbuseName:   SEI Information Technology
OrgAbusePhone:  +1-412-268-3416 
OrgAbuseEmail:  [email protected]
OrgAbuseRef:    https://rdap.arin.net/registry/entity/SIT6-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.
#

Hosted domains — PDNS pivot

Domain	Rank	First seen	Last seen	Hits
cmu.edu	#836	2026-07-13	2026-08-28	34