203.21.125.0/24

AS45671 · Wholesale Services Provider

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Summary

Country	Australia
Domain	mailguard.com.au
ASN	AS45671
Registry	APNIC
ID	MAILGUA-AU

WHOIS Details

inetnum:        203.21.125.0 - 203.21.125.255
netname:        MAILGUA-AU
descr:          MailGuard Pty. Ltd.
descr:          68-72 York St.
descr:          Sth Melbourne VIC 3205
country:        AU
org:            ORG-MPL15-AP
admin-c:        MPLA7-AP
tech-c:         MPLA7-AP
abuse-c:        AA1642-AP
status:         ASSIGNED PORTABLE
mnt-by:         APNIC-HM
mnt-routes:     MAINT-AU-MAILGUARD
mnt-irt:        IRT-AU-MAILGUARD
last-modified:  2020-06-22T05:29:29Z
source:         APNIC

irt:            IRT-AU-MAILGUARD
address:        68-72 York St.
address:        South Melbourne VIC 3205
phone:          +61 3 9694 4444
fax-no:         +61 3 9694 4410
e-mail:         netops@mailguard.com.au
abuse-mailbox:  netops@mailguard.com.au
admin-c:        MPLA7-AP
tech-c:         MPLA7-AP
auth:           # Filtered
remarks:        netops@mailguard.com.au was validated on 2025-07-22
mnt-by:         MAINT-AU-MAILGUARD
last-modified:  2025-11-18T00:29:14Z
source:         APNIC

organisation:   ORG-MPL15-AP
org-name:       MAILGUARD PTY. LTD.
org-type:       LIR
country:        AU
address:        68-72 York St
phone:          +61-3-9694-4444
fax-no:         +61-3-9694-4410
e-mail:         netops@mailguard.com.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:16:24Z
source:         APNIC

role:           ABUSE AUMAILGUARD
country:        ZZ
address:        68-72 York St.
address:        South Melbourne VIC 3205
phone:          +61 3 9694 4444
e-mail:         netops@mailguard.com.au
admin-c:        MPLA7-AP
tech-c:         MPLA7-AP
nic-hdl:        AA1642-AP
remarks:        Generated from irt object IRT-AU-MAILGUARD
remarks:        netops@mailguard.com.au was validated on 2025-07-22
abuse-mailbox:  netops@mailguard.com.au
mnt-by:         APNIC-ABUSE
last-modified:  2025-07-22T23:27:55Z
source:         APNIC

role:           MailGuard Pty. Ltd. administrator
address:        68-72 York St.
address:        South Melbourne VIC 3205
country:        AU
phone:          +61 3 9694 4444
fax-no:         +61 3 9694 4410
e-mail:         netops@mailguard.com.au
admin-c:        SC17-AP
tech-c:         SC17-AP
nic-hdl:        MPLA7-AP
mnt-by:         MAINT-AU-MAILGUARD
last-modified:  2014-07-04T05:42:50Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 203.21.0.0/16

Range	ASN	Company	Num of IPs
203.21.112.0/21	AS133612	VODAFONE AUSTRALIA PTY LIMITED	2,048
203.21.24.0/21	AS703	Verizon Australia PTY Limited	2,048
203.21.140.0/22	AS135409	Kacific Broadband Satellites Pte Ltd	1,024
203.21.108.0/22	AS133612	VODAFONE AUSTRALIA PTY LIMITED	1,024
203.21.150.0/23	AS137896	Hunter Water Corporation	512
203.21.128.0/23	AS2764	St. Vincent's Health & Aged Care Ltd.	512
203.21.130.0/23	AS10148	The University of Melbourne	512
203.21.42.0/23	AS56118	47/111 Tiwanon Road	512
203.21.76.0/23	AS38549	Viewbank Rise Networks	512
203.21.66.0/24	AS209854	Cyberzone S.A.	256
203.21.4.0/24	AS216053	Data Cloud Technology d.o.o Kragujevac	256
203.21.7.0/24	AS24448	Synamedia Technologies (India) Private Limited	256
203.21.79.0/24	AS2764	First Linear	256
203.21.72.0/24	AS395793	Mistic Internet Security Pty Ltd	256
203.21.20.0/24	AS4739	iiNet Limited	256
203.21.134.0/24	AS58716	Penrith City Council	256
203.21.5.0/24	AS7545	Micronica	256
203.21.78.0/24	AS7545	iiNet Limited	256
203.21.121.0/24	AS7575	Universities Australia	256
203.21.37.0/24	AS7575	Australian Academic and Research Network	256
203.21.83.0/24	AS7647	OnTheNet Pty Ltd	256
203.21.95.0/24	AS9009	Formosa Sydney Pty Limited	256
203.21.22.0/24	AS9266	Fiveways International Limited	256
203.21.207.0/24	AS10143	Infinet Group Pty Ltd	256
203.21.12.0/24	AS9650	CITEC	256
203.21.9.0/24	AS10143	OCTEC Incorporated	256
203.21.40.0/24	AS133015	City of Stirling	256
203.21.140.0/24	AS135409	Western Samoa Pool	256
203.21.65.0/24	AS154329	Phoenix Business Solutions Australia Pty Ltd	256
203.21.120.0/24	AS17882	Univision LLC	256
203.21.21.0/24	AS17889	Intraceptives Pty Ltd	256
203.21.104.0/24	AS18986	Calligo (Canada) Inc.	256
203.21.47.0/24	AS18986	Calligo (Canada) Inc.	256

Hosted domains

There are no domains currently hosted on this ASN.

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

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Pingable IPs

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

IP Address	ASN	Details
203.21.125.204	AS45671 Wholesale Services Provider	`0.12ms` from Melbourne, 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
94.68.110.216	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`10.55ms` from Athens, GR
71.76.117.104	AS11426 Charter Communications Inc	`11.28ms` from Atlanta, US
81.245.243.104	AS5432 Proximus NV	`1.93ms` from Brussels, BE
67.167.137.72	AS7922 Comcast Cable Communications, LLC	`9.42ms` from Flint, US
130.185.120.168	AS57568 ARVANCLOUD GLOBAL TECHNOLOGIES L.L.C	`0.89ms` from Frankfurt am Main, DE
95.135.118.40	AS5065 Bunny Communications	`0.26ms` from Hong Kong, HK
114.99.165.200	AS4134 CHINANET-BACKBONE	`8.85ms` from Huai'an, CN
70.127.214.152	AS33363 Charter Communications, Inc	`5.95ms` from Orlando, US
81.66.129.232	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`11.19ms` from Paris, FR
112.163.244.104	AS4766 Korea Telecom	`7.15ms` from Seoul, KR
59.151.44.184	AS9308 Abitcool(China) Inc.	`2.40ms` from Tianjin, CN
210.234.9.40	AS2516 KDDI CORPORATION	`5.98ms` from Tokyo, JP
41.62.250.40	AS37705 TOPNET	`1.55ms` from Tunis, TN
110.32.8.168	AS4804 Microplex PTY LTD	`2.02ms` from Brisbane, AU
9.160.48.136	AS8075 Microsoft Corporation	`0.84ms` from Brussels, BE
84.224.144.56	AS213155 Yettel Hungary Ltd.	`17.62ms` from Budapest, HU
74.215.34.200	AS6181 Cincinnati Bell Telephone Company LLC	`1.29ms` from Cincinnati, US
93.221.33.136	AS3320 Deutsche Telekom AG	`8.16ms` from Frankfurt am Main, DE
61.238.60.24	AS9269 Hong Kong Broadband Network Ltd.	`1.16ms` from Hong Kong, HK
101.165.198.184	AS1221 Telstra Limited	`2.27ms` from Melbourne, AU
189.183.219.152	AS8151 UNINET	`8.16ms` from Monterrey, MX
153.216.12.232	AS4713 NTT DOCOMO BUSINESS,Inc.	`11.17ms` from Osaka, JP
170.78.57.8	AS271718 ESTAR ON INTERNET FIBRA OPTICA LTDA	`1.21ms` from Osasco, BR
177.144.190.72	AS27699 TELEFÔNICA BRASIL S.A	`5.97ms` from Osasco, BR
34.141.223.120	AS396982 Google LLC	`0.13ms` from Oudeschip, NL

Traceroute

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

traceroute -a -n -q1 203.21.125.33

traceroute to 203.21.125.33 (203.21.125.33): 64 hops max, 52 byte packets

1 [AS64073] 163.47.131.129 0.539 ms

2 [AS64073] 103.243.102.184 0.599 ms

3 [AS64073] 103.243.102.64 0.451 ms

4 *

5 [] 45.127.172.70 23.844 ms

6 [] 203.26.198.66 23.693 ms

7 [] 118.127.58.127 33.599 ms

8 [] 118.127.58.44 33.371 ms

9 [] 118.127.58.30 54.853 ms

10 *

11 [AS45671] 203.21.125.33 33.445 ms

Measurement taken from

IPinfo ProbeNet in Auckland, NZ

On December 6th 2025

What are IP address ranges?

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