123.50.128.0/20

AS17551 · Anycast Global Backbone

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Summary

Country	Australia
Domain	swoop.com.au
ASN	AS17551
Registry	APNIC
ID	SWOOP-AU

WHOIS Details

inetnum:        123.50.128.0 - 123.50.159.255
netname:        SWOOP-AU
descr:          Swoop Telecommunications Pty Ltd
country:        AU
org:            ORG-CC4-AP
admin-c:        STNO1-AP
tech-c:         STNO1-AP
abuse-c:        AS3504-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-AU-SWOOP
mnt-routes:     MAINT-AU-SWOOP
mnt-irt:        IRT-SWOOP-AU
last-modified:  2023-10-26T21:51:10Z
geofeed:        https://geofeed.swoop.com.au/geofeed.csv
source:         APNIC

irt:            IRT-SWOOP-AU
address:        PO Box 1745
address:        Gosford, NSW, 2250
e-mail:         neteng@swoop.com.au
abuse-mailbox:  abuse@swoop.com.au
admin-c:        STNO1-AP
tech-c:         STNO1-AP
auth:           # Filtered
remarks:        abuse@swoop.com.au was validated on 2025-08-24
remarks:        neteng@swoop.com.au was validated on 2025-11-26
mnt-by:         MAINT-AU-SWOOP
last-modified:  2025-11-26T23:02:53Z
source:         APNIC

organisation:   ORG-CC4-AP
org-name:       Swoop Telecommunications Pty Ltd
org-type:       LIR
country:        AU
address:        PO Box 1745
phone:          +612-4336-2000
fax-no:         +612-43232177
e-mail:         info@cirruscomms.com.au
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:06Z
source:         APNIC

role:           ABUSE SWOOPAU
country:        ZZ
address:        PO Box 1745
address:        Gosford, NSW, 2250
phone:          +000000000
e-mail:         neteng@swoop.com.au
admin-c:        STNO1-AP
tech-c:         STNO1-AP
nic-hdl:        AS3504-AP
remarks:        Generated from irt object IRT-SWOOP-AU
remarks:        abuse@swoop.com.au was validated on 2025-08-24
remarks:        neteng@swoop.com.au was validated on 2025-11-26
abuse-mailbox:  abuse@swoop.com.au
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-26T23:03:42Z
source:         APNIC

role:           Swoop Telecommunications Network Operations
address:        PO Box 1745
country:        AU
phone:          +61-2-4336-2098
e-mail:         neteng@swoop.com.au
admin-c:        STNO1-AP
tech-c:         STNO1-AP
nic-hdl:        STNO1-AP
notify:         neteng@swoop.com.au
mnt-by:         MAINT-AU-SWOOP
last-modified:  2023-06-06T02:52:39Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 123.50.0.0/16

Range	ASN	Company	Num of IPs
123.50.64.0/18	AS9471	ONATI	16,384
123.50.0.0/19	AS10013	FreeBit Co., Ltd.	8,192
123.50.192.0/19	AS2514	INTERLINK Co.,LTD.	8,192
123.50.240.0/20	AS9614	Oita Cable Telecom Co.,Ltd.	4,096
123.50.224.0/20	AS9614	Oita Cable Telecom Co.,Ltd.	4,096
123.50.60.0/24	AS18429	CABLE GIANT CATV. CO., LTD.	256
123.50.58.0/24	AS18429	CABLE GIANT CATV. CO., LTD.	256
123.50.59.0/24	AS18429	CABLE GIANT CATV. CO., LTD.	256

Hosted domains

There are 10 domain names hosted across 9 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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

1,455 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
123.50.134.172	AS17551 Anycast Global Backbone	`1.40ms` from Perth, AU
123.50.131.238	AS17551 Anycast Global Backbone	`1.05ms` from Perth, AU
123.50.130.129	AS17551 Anycast Global Backbone	`1.11ms` from Perth, AU
123.50.132.218	AS17551 Anycast Global Backbone	`1.00ms` from Perth, AU
123.50.137.148	AS17551 Anycast Global Backbone	`1.27ms` from Adelaide, AU
123.50.133.182	AS17551 Anycast Global Backbone	`0.79ms` from Perth, AU
123.50.135.26	AS17551 Anycast Global Backbone	`1.36ms` from Perth, AU
123.50.129.107	AS17551 Anycast Global Backbone	`1.37ms` from Perth, AU
123.50.141.237	AS17551 Anycast Global Backbone	`0.84ms` from Perth, AU
123.50.142.113	AS17551 Anycast Global Backbone	`1.39ms` from Perth, AU
123.50.138.190	AS17551 Anycast Global Backbone	`1.43ms` from Adelaide, AU
123.50.136.1	AS17551 Anycast Global Backbone	`0.70ms` from Brisbane, AU
123.50.143.187	AS17551 Anycast Global Backbone	`1.41ms` from Perth, AU
123.50.128.1	AS17551 Anycast Global Backbone	`0.63ms` from Brisbane, AU
123.50.140.2	AS17551 Anycast Global Backbone	`0.80ms` from Perth, 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
75.236.193.52	AS6167 Verizon Business	`9.09ms` from Atlanta, US
38.75.108.100	AS174 Cogent Communications, LLC	`11.70ms` from Chicago, US
194.59.2.116	AS24989 Equinix (Germany) GmbH	`7.52ms` from Frankfurt am Main, DE
90.33.254.4	AS3215 Orange S.A.	`19.65ms` from Frankfurt am Main, DE
118.71.127.100	AS18403 FPT Telecom Company	`0.66ms` from Hanoi, VN
94.9.152.116	AS5607 Sky UK Limited	`8.50ms` from London, GB
159.223.176.228	AS14061 DigitalOcean, LLC	`0.24ms` from New York City, US
167.206.45.148	AS6128 Cablevision Systems Corp.	`1.23ms` from New York City, US
68.140.239.244	AS701 Verizon Business	`0.85ms` from San Jose, US
114.56.173.228	AS16509 Amazon.com, Inc.	`5.49ms` from Seattle, US
112.185.135.244	AS4766 Korea Telecom	`8.45ms` from Seoul, KR
91.189.94.132	AS41231 Canonical Group Limited	`0.44ms` from Stockholm, SE
95.137.168.196	AS34797 System Net Ltd	`0.72ms` from Tbilisi, GE
195.251.41.4	AS5408 National Infrastructures for Research and Technology S.A.	`1.46ms` from Athens, GR
81.228.236.36	AS3301 Telia Company AB	`4.76ms` from Copenhagen, DK
87.174.141.4	AS3320 Deutsche Telekom AG	`3.12ms` from Duesseldorf, DE
109.148.200.84	AS2856 British Telecommunications PLC	`4.92ms` from London, GB
91.125.189.116	AS6871 Plusnet	`5.21ms` from London, GB
94.162.7.228	AS1267 WIND TRE S.P.A.	`13.86ms` from Milan, IT
73.193.241.244	AS7922 Comcast Cable Communications, LLC	`7.71ms` from Morris Plains, US
103.251.56.36	AS45916 Gujarat Telelink Pvt Ltd	`13.64ms` from Mumbai, IN
91.44.144.52	AS3320 Deutsche Telekom AG	`1.97ms` from Nuernberg, DE
114.156.159.212	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.13ms` from Osaka, JP
157.15.200.4	AS2914 NTT America, Inc.	`0.31ms` from Tokyo, JP
35.95.112.4	AS16509 Amazon.com, Inc.	`0.49ms` from Boardman, US

Traceroute

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

traceroute -a -n -q1 123.50.129.221

traceroute to 123.50.129.221 (123.50.129.221): 64 hops max, 52 byte packets

1 [AS15169] 74.125.251.94 1.126 ms

2 [AS15169] 192.178.97.216 1.455 ms

3 *

4 *

5 *

6 [] 103.30.216.43 47.898 ms

7 [AS17551] 14.192.56.1 47.667 ms

8 [AS17551] 123.50.129.221 53.575 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

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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