`mtr --report --report-wide --report-cycles=1 216.73.216.72`
Start: 2026-09-23T16:58:04-0700
HOST: interstellar Loss% Snt Last Avg Best Wrst StDev
1.|-- 169.254.169.254 0.0% 1 0.2 0.2 0.2 0.2 0.0
2.|-- 100.100.100.1 0.0% 1 0.3 0.3 0.3 0.3 0.0
3.|-- 10.66.1.165 0.0% 1 2.1 2.1 2.1 2.1 0.0
4.|-- ??? 100.0 1 0.0 0.0 0.0 0.0 0.0
5.|-- 10.66.1.237 0.0% 1 0.8 0.8 0.8 0.8 0.0
6.|-- ce-5-5-0-0.a02.sttlwa01.us.bb.gin.ntt.net 0.0% 1 0.9 0.9 0.9 0.9 0.0
7.|-- ae-1.r27.sttlwa01.us.bb.gin.ntt.net 0.0% 1 1.1 1.1 1.1 1.1 0.0
8.|-- ae-5.r24.chcgil09.us.bb.gin.ntt.net 0.0% 1 42.9 42.9 42.9 42.9 0.0
9.|-- ae-3.a05.chcgil09.us.bb.gin.ntt.net 0.0% 1 42.8 42.8 42.8 42.8 0.0
10.|-- ??? 100.0 1 0.0 0.0 0.0 0.0 0.0
`ipin 216.73.216.72`
4 Address: 216.73.216.72
4 Prefix: 216.73.216.0/22
4 Origin: AS16509 [AMAZON-02 - Amazon.com, Inc., US]
`dig -x 216.73.216.72`
; <<>> DiG 9.20.22-1-Debian <<>> -x 216.73.216.72
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 41033
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 70d96951d2ea7fec010000006ab46795f6e512ebdb731d70 (good)
;; QUESTION SECTION:
;72.216.73.216.in-addr.arpa. IN PTR
;; AUTHORITY SECTION:
216.in-addr.arpa. 10800 IN SOA z.arin.net. dns-ops.arin.net. 2017041086 1800 900 691200 10800
;; Query time: 60 msec
;; SERVER: 10.3.4.22#53(10.3.4.22) (UDP)
;; WHEN: Wed Sep 23 16:58:13 PDT 2026
;; MSG SIZE rcvd: 137
`whois 216.73.216.72`
#
# 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: 216.73.208.0 - 216.73.219.255
CIDR: 216.73.216.0/22, 216.73.208.0/21
NetName: AMAZO-4
NetHandle: NET-216-73-208-0-1
Parent: NET216 (NET-216-0-0-0-0)
NetType: Direct Allocation
OriginAS:
Organization: Amazon.com, Inc. (AMAZO-4)
RegDate: 2024-03-26
Updated: 2024-03-26
Ref: https://rdap.arin.net/registry/ip/216.73.208.0
OrgName: Amazon.com, Inc.
OrgId: AMAZO-4
Address: Amazon Web Services, Inc.
Address: P.O. Box 81226
City: Seattle
StateProv: WA
PostalCode: 98108-1226
Country: US
RegDate: 2005-09-29
Updated: 2026-04-17
Comment: For details of this service please see
Comment: http://ec2.amazonaws.com
Ref: https://rdap.arin.net/registry/entity/AMAZO-4
OrgRoutingHandle: ARMP-ARIN
OrgRoutingName: AWS RPKI Management POC
OrgRoutingPhone: +1-206-555-0000
OrgRoutingEmail: aws-rpki-routing-poc@amazon.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/ARMP-ARIN
OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-555-0000
OrgAbuseEmail: trustandsafety@support.aws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN
OrgDNSHandle: DNS1131-ARIN
OrgDNSName: DNS
OrgDNSPhone: +1-202-555-0000
OrgDNSEmail: ipmanagement+dns@amazon.com
OrgDNSRef: https://rdap.arin.net/registry/entity/DNS1131-ARIN
OrgNOCHandle: AANO1-ARIN
OrgNOCName: Amazon AWS Network Operations
OrgNOCPhone: +1-206-555-0000
OrgNOCEmail: amzn-noc-contact@amazon.com
OrgNOCRef: https://rdap.arin.net/registry/entity/AANO1-ARIN
OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-555-0000
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN
OrgRoutingHandle: IPROU3-ARIN
OrgRoutingName: IP Routing
OrgRoutingPhone: +1-206-555-0000
OrgRoutingEmail: aws-routing-poc@amazon.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/IPROU3-ARIN
# end
# start
NetRange: 216.73.216.0 - 216.73.219.255
CIDR: 216.73.216.0/22
NetName: AWS-ANTHROPIC
NetHandle: NET-216-73-216-0-1
Parent: AMAZO-4 (NET-216-73-208-0-1)
NetType: Reassigned
OriginAS:
Organization: Anthropic, PBC (AP-2440)
RegDate: 2024-06-05
Updated: 2024-06-05
Ref: https://rdap.arin.net/registry/ip/216.73.216.0
OrgName: Anthropic, PBC
OrgId: AP-2440
Address: 548 Market St.
Address: PMB 90375
City: San Francisco
StateProv: CA
PostalCode: 94104-5401
Country: US
RegDate: 2023-07-31
Updated: 2023-08-22
Ref: https://rdap.arin.net/registry/entity/AP-2440
OrgTechHandle: ANTHR5-ARIN
OrgTechName: Anthropic
OrgTechPhone: +1-415-236-0599
OrgTechEmail: arin@anthropic.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN
OrgRoutingHandle: ANTHR5-ARIN
OrgRoutingName: Anthropic
OrgRoutingPhone: +1-415-236-0599
OrgRoutingEmail: arin@anthropic.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN
OrgNOCHandle: ANTHR5-ARIN
OrgNOCName: Anthropic
OrgNOCPhone: +1-415-236-0599
OrgNOCEmail: arin@anthropic.com
OrgNOCRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN
OrgDNSHandle: ANTHR5-ARIN
OrgDNSName: Anthropic
OrgDNSPhone: +1-415-236-0599
OrgDNSEmail: arin@anthropic.com
OrgDNSRef: https://rdap.arin.net/registry/entity/ANTHR5-ARIN
OrgAbuseHandle: ANTHR5-ARIN
OrgAbuseName: Anthropic
OrgAbusePhone: +1-415-236-0599
OrgAbuseEmail: arin@anthropic.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ANTHR5-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.
#