123.51.0.0/17

AS38333 · Symbio Networks

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Summary

Country	Australia
Domain	telcoinabox.com.au
ASN	AS38333
Registry	APNIC
ID	INABOX-AU

WHOIS Details

inetnum:        123.51.0.0 - 123.51.127.255
netname:        INABOX-AU
descr:          Telcoinabox Operations Pty Ltd
descr:          L10, 9 Hunter Street, Sydney NSW 2000
country:        AU
org:            ORG-TOPL1-AP
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
abuse-c:        AI731-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-INABOX-AU
mnt-routes:     MAINT-INABOX-AU
mnt-irt:        IRT-INABOX-AU
last-modified:  2020-11-25T13:04:09Z
source:         APNIC

irt:            IRT-INABOX-AU
address:        L3, 580 George Street, Sydney NSW 2000
e-mail:         abuse@symbionetworks.com
abuse-mailbox:  abuse@symbionetworks.com
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
auth:           # Filtered
remarks:        abuse@symbionetworks.com was validated on 2025-12-01
mnt-by:         MAINT-INABOX-AU
last-modified:  2025-12-01T04:18:34Z
source:         APNIC

organisation:   ORG-TOPL1-AP
org-name:       Telcoinabox Operations Pty Ltd
org-type:       LIR
country:        AU
address:        L3, 580 George St
phone:          +61-2-82756871
e-mail:         sysadmin@telcoinabox.com
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2024-12-20T12:58:47Z
source:         APNIC

role:           ABUSE INABOXAU
country:        ZZ
address:        L3, 580 George Street, Sydney NSW 2000
phone:          +000000000
e-mail:         abuse@symbionetworks.com
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
nic-hdl:        AI731-AP
remarks:        Generated from irt object IRT-INABOX-AU
remarks:        abuse@symbionetworks.com was validated on 2025-12-01
abuse-mailbox:  abuse@symbionetworks.com
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-01T04:18:46Z
source:         APNIC

role:           Telcoinabox Operations Pty Ltd administrator
address:        L4, 580 George Street, Sydney NSW 2000
country:        AU
phone:          +61-2-82489034
fax-no:         +61-2-82489034
e-mail:         networkservices@telcoinabox.com
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
nic-hdl:        TOPL2-AP
mnt-by:         MAINT-INABOX-AU
last-modified:  2019-05-31T05:16:03Z
source:         APNIC

route:          123.51.0.0/17
origin:         AS38333
descr:          Telcoinabox Operations Pty Ltd L4, 580 George St
mnt-by:         MAINT-INABOX-AU
last-modified:  2021-10-18T23:00:22Z
source:         APNIC

route:          123.51.0.0/17
origin:         AS45510
descr:          Telcoinabox Operations Pty Ltd L4, 580 George St
mnt-by:         MAINT-INABOX-AU
last-modified:  2022-02-11T06:16:23Z
source:         APNIC

Overlapping Ranges

BGP prefixes that are contained by 123.51.0.0/17

Range	ASN	Company	Num of IPs
123.51.0.0/24	AS38333	Level 6, 9-13 Young Street	256

Nearby Ranges

BGP prefixes that overlap with 123.51.0.0/16

Range	ASN	Company	Num of IPs
123.51.128.0/17	AS4780	New Century InfoComm Tech. Co., Ltd.	32,768
123.51.128.0/17	AS9919	New Century InfoComm Tech. Co., Ltd.	32,768
123.51.172.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.220.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.220.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.132.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.160.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.168.0/22	AS4780	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.128.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.132.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.160.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.164.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.168.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.172.0/22	AS9919	New Century InfoComm Tech. Co., Ltd.	1,024
123.51.0.0/24	AS38333	Level 6, 9-13 Young Street	256
123.51.188.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.193.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.194.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.195.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.181.0/24	AS4780	New Century InfoComm Tech. Co., Ltd.	256
123.51.196.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.197.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.198.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.199.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256
123.51.208.0/24	AS9919	New Century InfoComm Tech. Co., Ltd.	256

Hosted domains

There are 139 domain names hosted across 58 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
123.51.31.4	bkx.au	2
123.51.31.216	checkhealth.space	2
123.51.30.131	serenux.com	2
123.51.30.148	utomo.com.au	2
123.51.30.252	shaunjo6971.com	1
123.51.31.54	steventech.net	1
123.51.33.40	vandersmagt.com.au	1
123.51.31.166	ishatmypants.help	1
123.51.31.10	zephan.com.au	1
123.51.125.25	franks.com.au	1
123.51.125.23	powers.co.nz	1
123.51.31.72	cpreporting.com.au	1
123.51.124.30	activefactors.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

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Pingable IPs

3,198 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
123.51.2.107	AS38333 Symbio Networks	`1.63ms` from Sydney, AU
123.51.0.154	AS38333 Symbio Networks	`23.74ms` from Sydney, AU
123.51.1.112	AS38333 Symbio Networks	`23.51ms` from Sydney, AU
123.51.37.108	AS38333 Symbio Networks	`1.78ms` from Sydney, AU
123.51.4.196	AS38333 Symbio Networks	`14.24ms` from Sydney, AU
123.51.35.164	AS38333 Symbio Networks	`14.42ms` from Sydney, AU
123.51.5.235	AS38333 Symbio Networks	`12.32ms` from Sydney, AU
123.51.65.211	AS38333 Symbio Networks	`23.88ms` from Sydney, AU
123.51.9.105	AS38333 Symbio Networks	`47.44ms` from Sydney, AU
123.51.29.218	AS38333 Symbio Networks	`21.14ms` from Sydney, AU
123.51.78.99	AS38333 Symbio Networks	`14.56ms` from Sydney, AU
123.51.76.38	AS38333 Symbio Networks	`14.19ms` from Sydney, AU
123.51.21.57	AS38333 Symbio Networks	`14.28ms` from Sydney, AU
123.51.23.29	AS38333 Symbio Networks	`1.48ms` from Sydney, AU
123.51.117.117	AS38333 Symbio Networks	`0.43ms` from Sydney, AU
123.51.6.28	AS38333 Symbio Networks	`20.76ms` from Sydney, AU
123.51.31.18	AS38333 Symbio Networks	`1.86ms` from Sydney, AU
123.51.13.108	AS38333 Symbio Networks	`14.38ms` from Sydney, AU
123.51.7.172	AS38333 Symbio Networks	`20.94ms` from Sydney, AU
123.51.120.225	AS38333 Symbio Networks	`11.79ms` from Sydney, AU
123.51.107.93	AS38333 Symbio Networks	`12.94ms` from Sydney, AU
123.51.68.58	AS38333 Symbio Networks	`2.02ms` from Sydney, AU
123.51.62.220	AS38333 Symbio Networks	`12.30ms` from Sydney, AU
123.51.10.35	AS38333 Symbio Networks	`14.24ms` from Sydney, AU
123.51.22.48	AS38333 Symbio Networks	`1.66ms` 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
217.105.128.1	AS33915 Vodafone Libertel B.V.	`3.34ms` from Amsterdam, NL
94.211.170.1	AS33915 Vodafone Libertel B.V.	`3.97ms` from Amsterdam, NL
178.148.24.1	AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.	`1.07ms` from Belgrade, RS
178.223.199.1	AS8400 TELEKOM SRBIJA a.d.	`2.88ms` from Belgrade, RS
200.26.128.17	AS14080 Telmex Colombia S.A.	`1.29ms` from Bogota, CO
190.178.13.145	AS22927 Telefonica de Argentina	`2.33ms` from Buenos Aires, AR
190.245.10.1	AS7303 Telecom Argentina S.A.	`1.10ms` from Buenos Aires, AR
159.90.56.1	AS11694 Universidad Simon Bolivar	`3.04ms` from Caracas, VE
119.51.230.1	AS4837 CHINA UNICOM China169 Backbone	`0.69ms` from Changchun, CN
223.151.136.1	AS4134 CHINANET-BACKBONE	`4.20ms` from Changsha, CN
116.128.251.1	AS4837 CHINA UNICOM China169 Backbone	`3.35ms` from Changsha, CN
107.15.253.1	AS11426 Charter Communications Inc	`8.39ms` from Charlotte, US
117.173.148.33	AS9808 China Mobile Communications Group Co., Ltd.	`3.22ms` from Chengdu, CN
73.74.248.1	AS7922 Comcast Cable Communications, LLC	`2.56ms` from Chicago, US
27.15.8.1	AS4837 CHINA UNICOM China169 Backbone	`2.41ms` from Chongqing, CN
103.84.162.177	AS4755 TATA Communications formerly VSNL is Leading ISP	`2.87ms` from Colombo, LK
87.52.251.1	AS3292 TDC Holding A/S	`4.03ms` from Copenhagen, DK
62.107.196.1	AS39642 Norlys Digital A/S	`0.46ms` from Copenhagen, DK
69.2.159.241	AS12011 Thompson School District	`2.17ms` from Denver, US
199.195.173.129	AS32889 Southwestern Wireless, Inc.	`16.68ms` from Denver, US
75.158.172.1	AS852 TELUS Communications Inc.	`1.09ms` from Edmonton, CA
178.201.206.1	AS3209 Vodafone GmbH	`5.72ms` from Frankfurt am Main, DE
220.162.178.1	AS4134 CHINANET-BACKBONE	`7.67ms` from Fuzhou, CN
84.115.106.1	AS8412 T-Mobile Austria GmbH	`0.23ms` from Graz, AT
157.157.226.1	AS6677 Mila hf	`8.45ms` from Hafnarfjoerdur, IS

Traceroute

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

traceroute -a -n -q1 -f6 123.51.36.3

traceroute to 123.51.36.3 (123.51.36.3): 64 hops max, 52 byte packets

6 [AS38333] 123.51.36.3 3.211 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On February 7th 2026

What are IP address ranges?

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