203.21.193.0/24

AS1221 · Telstra Limited

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Summary

Country	Australia
Domain	nsw.gov.au
ASN	AS1221
Registry	APNIC
ID	NNLHD-AU

WHOIS Details

inetnum:        203.21.192.0 - 203.21.199.255
netname:        NNLHD-AU
descr:          Northern NSW Local Health District
country:        AU
org:            ORG-NNLH1-AP
admin-c:        NNLH1-AP
tech-c:         NNLH1-AP
abuse-c:        AN762-AP
status:         ALLOCATED PORTABLE
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-NNLHD-AU
mnt-routes:     MAINT-NNLHD-AU
mnt-irt:        IRT-NNLHD-AU
last-modified:  2020-06-22T05:06:25Z
source:         APNIC

irt:            IRT-NNLHD-AU
address:        Locked bag 11, Lismore NSW 2480
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        NNLH1-AP
tech-c:         NNLH1-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2025-10-14
mnt-by:         MAINT-NNLHD-AU
last-modified:  2025-11-18T00:32:31Z
source:         APNIC

organisation:   ORG-NNLH1-AP
org-name:       Northern NSW Local Health District
org-type:       LIR
country:        AU
address:        Crawford House
address:        Hunter Street
phone:          +61 2 6620 2295
fax-no:         +61 2 6620 2230
e-mail:         [email protected]
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2024-01-24T13:00:37Z
source:         APNIC

role:           ABUSE NNLHDAU
country:        ZZ
address:        Locked bag 11, Lismore NSW 2480
phone:          +000000000
e-mail:         [email protected]
admin-c:        NNLH1-AP
tech-c:         NNLH1-AP
nic-hdl:        AN762-AP
remarks:        Generated from irt object IRT-NNLHD-AU
remarks:        [email protected] was validated on 2025-10-14
abuse-mailbox:  [email protected]
mnt-by:         APNIC-ABUSE
last-modified:  2025-10-14T20:51:03Z
source:         APNIC

role:           Northern NSW Local Health District administrator
address:        Locked bag 11, Lismore NSW 2480
country:        AU
phone:          +61 2 6620 2295
fax-no:         +61 2 6620 2295
e-mail:         [email protected]
admin-c:        NNLH1-AP
tech-c:         NNLH1-AP
nic-hdl:        NNLH1-AP
mnt-by:         MAINT-NNLHD-AU
last-modified:  2018-08-29T23:34:27Z
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
203.21.125.0/24	AS45671	MailGuard 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

Read more

Pingable IPs

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

IP Address	ASN	Details
203.21.193.1	AS1221 Telstra Limited	`12.50ms` from Sydney, 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
54.70.247.120	AS16509 Amazon.com, Inc.	`0.14ms` from Boardman, US
84.58.169.40	AS3209 Vodafone GmbH	`5.96ms` from Duesseldorf, DE
81.187.81.72	AS20712 Andrews & Arnold Ltd	`0.23ms` from London, GB
86.170.112.168	AS2856 British Telecommunications PLC	`1.49ms` from London, GB
156.233.97.120	AS44559 IT HOSTLINE LTD	`0.39ms` from Seoul, KR
86.94.76.120	AS1136 KPN B.V.	`2.55ms` from Amsterdam, NL
181.122.191.152	AS23201 Telecel S.A.	`8.09ms` from Asuncion, PY
24.100.53.184	AS11492 CABLE ONE, INC.	`7.59ms` from Chicago, US
20.241.7.248	AS8075 Microsoft Corporation	`0.40ms` from Chicago, US
136.113.131.56	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
187.204.124.56	AS8151 UNINET	`0.99ms` from Guadalajara, MX
60.174.212.40	AS4134 CHINANET-BACKBONE	`5.95ms` from Huai'an, CN
93.184.159.120	AS47288 FIXNET Telekomunikasyon Limited Sirketi	`5.43ms` from Istanbul, TR
35.244.184.88	AS396982 Google LLC	`0.08ms` from Melbourne, AU
35.231.113.232	AS396982 Google LLC	`0.14ms` from Moncks Corner, US
142.59.231.104	AS852 TELUS Communications Inc.	`5.31ms` from Montreal, CA
66.92.19.104	AS397630 Blazing SEO, LLC	`0.87ms` from New York City, US
8.28.225.200	AS22511 Presidio Networked Solutions LLC	`1.60ms` from Orlando, US
73.127.41.200	AS7922 Comcast Cable Communications, LLC	`7.33ms` from Salt Lake City, US
187.194.223.72	AS8151 UNINET	`1.16ms` from Santiago de Queretaro, MX
124.78.132.152	AS4812 China Telecom (Group)	`3.82ms` from Shanghai, CN
163.171.69.8	AS54994 Meteverse Limited.	`0.53ms` from Singapore, SG
60.231.34.56	AS1221 Telstra Limited	`2.32ms` from Sydney, AU
213.198.224.56	AS8771 YUnet International d.o.o.	`4.52ms` from Belgrade, RS
3.149.171.248	AS16509 Amazon.com, Inc.	`0.19ms` from Columbus, US

Traceroute

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

traceroute -a -n -q1 -f6 203.21.193.1

traceroute to 203.21.193.1 (203.21.193.1): 64 hops max, 52 byte packets

6 [AS1221] 138.217.181.65 0.221 ms

7 [AS1221] 203.50.12.132 2.431 ms

8 [AS1221] 203.50.11.99 1.138 ms

9 [AS1221] 203.50.11.102 1.142 ms

10 [AS1221] 203.21.193.1 12.522 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On December 14th 2025

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.

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