[ IP ]
128.135.221.21
#139,526Top IPs · 1M scope2 domains
Overview
Top IPs list rank
- 1M
- #139,526(2 domains)
- Hosted domains (90 days)
- 2
- Hosted domains (all time)
- 2
- First seen
- Mon Jul 13 2026 10:05:44 GM
- Last seen
- Wed Jul 15 2026 01:05:14 GM
- PDNS hits (90 days)
- 4
- Country
- US
- Snapshot
- 1970-01-01
Network operated by The University of Chicago (UNIVER-174-Z) (U-CHICAGO).
List rank history
2 daily snapshots in the Top IPs list (1M scope). Lower rank numbers indicate more hosted domains in scope.
Whois — 128.135.221.21
- Netname
- U-CHICAGO
- Organization
- The University of Chicago (UNIVER-174-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. # NetRange: 128.135.0.0 - 128.135.255.255 CIDR: 128.135.0.0/16 NetName: U-CHICAGO NetHandle: NET-128-135-0-0-1 Parent: NET128 (NET-128-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: The University of Chicago (UNIVER-174-Z) RegDate: 1986-07-08 Updated: 2023-12-05 Ref: https://rdap.arin.net/registry/ip/128.135.0.0 OrgName: The University of Chicago OrgId: UNIVER-174-Z Address: 1155 E. 60th Street City: Chicago StateProv: IL PostalCode: 60637 Country: US RegDate: 2023-02-27 Updated: 2023-04-19 Ref: https://rdap.arin.net/registry/entity/UNIVER-174-Z OrgNOCHandle: DNO22-ARIN OrgNOCName: Data Network Operations OrgNOCPhone: +1-773-702-7626 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/DNO22-ARIN OrgTechHandle: DOMAI99-ARIN OrgTechName: Domain Administrator OrgTechPhone: +1-773-702-7626 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/DOMAI99-ARIN OrgAbuseHandle: NSC26-ARIN OrgAbuseName: Network Security Center OrgAbusePhone: +1-773-702-2378 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/NSC26-ARIN RNOCHandle: DNO22-ARIN RNOCName: Data Network Operations RNOCPhone: +1-773-702-7626 RNOCEmail: [email protected] RNOCRef: https://rdap.arin.net/registry/entity/DNO22-ARIN RTechHandle: DOMAI99-ARIN RTechName: Domain Administrator RTechPhone: +1-773-702-7626 RTechEmail: [email protected] RTechRef: https://rdap.arin.net/registry/entity/DOMAI99-ARIN RAbuseHandle: NSC26-ARIN RAbuseName: Network Security Center RAbusePhone: +1-773-702-2378 RAbuseEmail: [email protected] RAbuseRef: https://rdap.arin.net/registry/entity/NSC26-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. #
Open ports — 128.135.221.21
Port scan not run for 128.135.221.21 yet. Probes are queued from passive DNS IPs in the worker pipeline.