203.173.42.0/23

AS4739 · Internode Pty Ltd

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Summary

Country	Australia
Domain	iinet.net.au
ASN	AS4739
Registry	APNIC
ID	IINET-AU

WHOIS Details

inetnum:        203.173.0.0 - 203.173.63.255
netname:        IINET-AU
descr:          iiNet Limited
descr:          Level 6, 263 Adelaide Terrace
descr:          Perth
country:        AU
org:            ORG-IL1-AP
admin-c:        IH207-AP
tech-c:         IH207-AP
abuse-c:        AI376-AP
status:         ALLOCATED PORTABLE
remarks:        ----------------------------------------
remarks:        Send abuse reports to [email protected]
remarks:        ----------------------------------------
remarks:        203.173.0.0/18 migrated from Tas Access
remarks:        ---------------------------------------------------
remarks:        This object can only be modified by APNIC hostmaster
remarks:        If you wish to modify this object details please
remarks:        send email to [email protected] with your organisation
remarks:        account name in the subject line.
remarks:        ----------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-AU-IH207-AP
mnt-irt:        IRT-IINET-AU
last-modified:  2020-06-03T13:04:10Z
source:         APNIC

irt:            IRT-IINET-AU
address:        iiNet Limited
address:        Level 9, 250 St Georges Tce
address:        Perth
address:        WA 6000
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        IH207-AP
tech-c:         IH207-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-10-30
mnt-by:         MAINT-AU-IH207-AP
last-modified:  2026-01-14T02:44:47Z
source:         APNIC

organisation:   ORG-IL1-AP
org-name:       iiNet Limited
org-type:       LIR
country:        AU
address:        502 Hay St
phone:          +61-8-9214-2222
fax-no:         +61-8-9214-2211
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:14:51Z
source:         APNIC

role:           ABUSE IINETAU
country:        ZZ
address:        iiNet Limited
address:        Level 9, 250 St Georges Tce
address:        Perth
address:        WA 6000
phone:          +000000000
e-mail:         [email protected]
admin-c:        IH207-AP
tech-c:         IH207-AP
nic-hdl:        AI376-AP
remarks:        Generated from irt object IRT-IINET-AU
remarks:        [email protected] was validated on 2025-10-30
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-10-30T06:56:20Z
source:         APNIC

person:         iiNet Hostmaster
nic-hdl:        IH207-AP
e-mail:         [email protected]
address:        iiNet Limited
address:        Level 9, 250 St Georges Tce
address:        Perth
address:        WA 6000
country:        AU
phone:          +61-8-9214-2222
fax-no:         +61-8-9214-2211
mnt-by:         MAINT-AU-IH207-AP
last-modified:  2011-12-22T05:14:51Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.173.0.0/16

Range	ASN	Company	Num of IPs
203.173.128.0/17	AS9500	One New Zealand Group Limited	32,768
203.173.96.0/19	AS202736	ILINKKOREA	8,192
203.173.96.0/19	AS216425	ILINKKOREA	8,192
203.173.96.0/19	AS38676	ILINKKOREA	8,192
203.173.64.0/20	AS17977	NF Park Bldg.3F, 9-15, Futaba 2-Chome	4,096
203.173.80.0/21	AS38715	Foresightwave INC.	2,048
203.173.106.0/24	AS395793	ILINKKOREAS	256
203.173.125.0/24	AS38676	RED MOUSE	256
203.173.92.0/24	AS18059	BUANTER-NET	256
203.173.93.0/24	AS18059	BUANTER-NET	256
203.173.95.0/24	AS18059	BUANTER-NET	256
203.173.94.0/24	AS18059	BUANTER-NET	256
203.173.115.0/24	AS202736	ILINKKOREAS	256

Hosted domains

There are 32 domain names hosted across 8 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.173.43.51	cybermedtech.au	17
203.173.42.90	dcssentinel.net	8
203.173.42.162	roblocke.com.au	2
203.173.43.176	fcot.com	1
203.173.43.65	quantum-it.com.au	1
203.173.42.77	prostart.au	1
203.173.43.237	jpj.com.au	1
203.173.43.180	lasbookkeeping.com.au	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

87 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.173.42.161	AS4739 Internode Pty Ltd	`1.75ms` from Brisbane, AU
203.173.43.68	AS4739 Internode Pty Ltd	`1.62ms` from Brisbane, AU

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
77.170.142.247	AS1136 KPN B.V.	`3.32ms` from Amsterdam, NL
52.245.241.103	AS8075 Microsoft Corporation	`0.59ms` from Boydton, US
173.223.1.199	AS16625 Akamai Technologies, Inc.	`0.22ms` from Dallas, US
20.123.109.199	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
98.195.26.7	AS7922 Comcast Cable Communications, LLC	`7.76ms` from Houston, US
199.46.244.247	AS12007 Raytheon Company	`2.37ms` from London, GB
68.4.119.55	AS22773 Cox Communications Inc.	`4.91ms` from Los Angeles, US
170.246.18.167	AS264295 Unolink Telecom Ltda	`15.22ms` from Muriae, BR
122.210.1.183	AS17506 ARTERIA Networks Corporation	`1.61ms` from Osaka, JP
187.112.54.103	AS18881 TELEFÔNICA BRASIL S.A	`4.07ms` from Osasco, BR
152.92.184.103	AS2715 Fundação Carlos Chagas Filho de Amparo a Pesquisa	`1.08ms` from Rio de Janeiro, BR
95.218.199.39	AS25019 Saudi Telecom Company JSC	`4.25ms` from Riyadh, SA
220.89.51.71	AS4766 Korea Telecom	`5.67ms` from Seoul, KR
1.227.193.55	AS9318 SK Broadband Co Ltd	`1.00ms` from Seoul, KR
8.132.19.7	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`3.58ms` from Shanghai, CN
87.202.67.135	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`6.70ms` from Athens, GR
210.10.205.151	AS2764 AAPT Limited	`0.65ms` from Brisbane, AU
18.158.112.103	AS16509 Amazon.com, Inc.	`0.17ms` from Frankfurt am Main, DE
90.48.110.23	AS3215 Orange S.A.	`12.09ms` from Frankfurt am Main, DE
219.248.195.199	AS9318 SK Broadband Co Ltd	`1.81ms` from Incheon, KR
95.120.130.231	AS3352 TELEFONICA DE ESPANA S.A.U.	`5.92ms` from Madrid, ES
211.219.71.215	AS4766 Korea Telecom	`1.11ms` from Seoul, KR
212.233.131.135	AS29582 Optisprint OOD	`3.62ms` from Sofia, BG
198.84.154.135	AS5645 TekSavvy Solutions, Inc.	`12.07ms` from Toronto, CA
79.129.231.7	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`1.21ms` from Athens, GR

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f2 203.173.42.29

traceroute to 203.173.42.29 (203.173.42.29): 64 hops max, 52 byte packets

2 [AS6453] 64.86.8.61 0.643 ms

3 [AS6453] 64.86.9.17 60.531 ms

4 [AS6453] 64.86.9.66 59.897 ms

5 [AS6453] 64.86.113.6 60.025 ms

6 *

7 [AS7545] 60.240.241.70 250.629 ms

8 [AS4739] 203.173.42.29 260.316 ms

Measurement taken from

IPinfo ProbeNet in Atlanta, US

On January 30th 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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