123.51.76.0/22

AS38333 · Symbio Networks

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Summary

Country	Australia
Domain	telcoinabox.com.au
ASN	AS38333
Parent Range	123.51.0.0/17
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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
auth:           # Filtered
remarks:        [email protected] 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:         [email protected]
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:         [email protected]
admin-c:        TOPL2-AP
tech-c:         TOPL2-AP
nic-hdl:        AI731-AP
remarks:        Generated from irt object IRT-INABOX-AU
remarks:        [email protected] was validated on 2025-12-01
abuse-mailbox:  [email protected]
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:         [email protected]
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 contain 123.51.76.0/22

Range	ASN	Company	Num of IPs
123.51.0.0/17	AS38333	Telcoinabox Operations Pty Ltd	32,768
123.51.0.0/17	AS45510	Telcoinabox Operations Pty Ltd	32,768

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
123.51.0.0/17	AS38333	Telcoinabox Operations Pty Ltd	32,768
123.51.128.0/17	AS9919	New Century InfoComm Tech. Co., Ltd.	32,768
123.51.0.0/17	AS45510	Telcoinabox Operations Pty 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 4 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
123.51.76.228	AS38333 Symbio Networks	`14.35ms` from Sydney, AU
123.51.77.40	AS38333 Symbio Networks	`14.86ms` from Sydney, AU
123.51.78.2	AS38333 Symbio Networks	`14.59ms` from Sydney, AU
123.51.79.45	AS38333 Symbio Networks	`14.38ms` 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
208.123.185.166	AS57043 HOSTKEY B.V.	`0.40ms` from Amsterdam, NL
96.75.200.246	AS7922 Comcast Cable Communications, LLC	`7.64ms` from Ashburn, US
85.74.102.246	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`1.16ms` from Athens, GR
8.243.64.22	AS3356 Level 3 Parent, LLC	`1.18ms` from Bogota, CO
75.147.173.102	AS7922 Comcast Cable Communications, LLC	`13.28ms` from Dallas, US
23.31.124.54	AS7922 Comcast Cable Communications, LLC	`10.77ms` from Dallas, US
14.178.50.150	AS45899 VNPT Corp	`2.39ms` from Hanoi, VN
77.99.61.70	AS5089 Virgin Media Limited	`10.77ms` from London, GB
195.226.43.118	AS5413 Wavenet Limited	`5.46ms` from London, GB
89.106.1.86	AS19318 Interserver, Inc	`0.64ms` from New York City, US
179.209.198.6	AS28573 Claro NXT Telecomunicacoes Ltda	`2.33ms` from Osasco, BR
27.211.25.54	AS4837 CHINA UNICOM China169 Backbone	`5.73ms` from Qingdao, CN
20.188.94.230	AS8075 Microsoft Corporation	`0.18ms` from San Antonio, US
189.7.65.166	AS28573 Claro NXT Telecomunicacoes Ltda	`8.22ms` from Sao Paulo, BR
59.123.10.150	AS3462 Data Communication Business Group	`1.61ms` from Taichung, TW
219.167.95.246	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.71ms` from Tokyo, JP
4.248.146.214	AS8075 Microsoft Corporation	`0.80ms` from Toronto, CA
2.135.185.230	AS9198 JSC Kazakhtelecom	`16.91ms` from Aktau, KZ
94.53.225.70	AS48161 NEXTGEN COMMUNICATIONS SRL	`8.30ms` from Bucharest, RO
130.163.73.246	AS668 United States Department of Defense (DoD)	`4.21ms` from Chicago, US
121.196.43.182	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.55ms` from Hangzhou, CN
144.214.138.246	AS4158 City University of Hong Kong	`2.33ms` from Hong Kong, HK
85.106.75.6	AS9121 Turk Telekomunikasyon Anonim Sirketi	`13.45ms` from Istanbul, TR
112.215.81.214	AS17885 PT XL Axiata Tbk	`0.87ms` from Jakarta, ID
213.154.194.166	AS21497 PrJSC VF UKRAINE	`10.71ms` from Kyiv, UA

Traceroute

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

traceroute -a -n -q1 -f3 123.51.77.185

traceroute to 123.51.77.185 (123.51.77.185): 64 hops max, 52 byte packets

3 [] 45.127.172.45 0.809 ms

4 [AS38333] 123.51.77.185 17.786 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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