1. All IP Ranges
  2. 123.0.0.0/8
  3. 123.51.0.0/16
  4. AS38333  | 123.51.72.0/21

123.51.72.0/21

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:         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 contain 123.51.72.0/21

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 7 domain names hosted across 4 IP addresses 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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Pingable IPs

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

IP Address ASN Details
123.51.78.99 AS38333 Symbio Networks 14.56ms from Sydney, AU
123.51.76.38 AS38333 Symbio Networks 14.19ms from Sydney, AU
123.51.74.174 AS38333 Symbio Networks 14.39ms from Sydney, AU
123.51.77.204 AS38333 Symbio Networks 14.53ms from Sydney, AU
123.51.79.45 AS38333 Symbio Networks 14.38ms from Sydney, AU
123.51.75.73 AS38333 Symbio Networks 14.19ms 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
75.245.237.165 AS6167 Verizon Business 11.35ms from Atlanta, US
50.210.97.165 AS7922 Comcast Cable Communications, LLC 6.17ms from Boston, US
73.100.70.69 AS7922 Comcast Cable Communications, LLC 4.87ms from Boston, US
73.159.83.117 AS7922 Comcast Cable Communications, LLC 8.90ms from Boston, US
13.245.149.85 AS16509 Amazon.com, Inc. 0.11ms from Cape Town, ZA
96.178.196.37 AS36377 Comcast Cable Communications, LLC 0.87ms from Chicago, US
86.158.12.21 AS2856 British Telecommunications PLC 6.99ms from Erith, GB
172.225.6.69 AS36183 Akamai Technologies, Inc. 0.32ms from Frankfurt am Main, DE
208.115.237.117 AS46475 Limestone Networks, Inc. 0.53ms from Los Angeles, US
95.249.17.21 AS3269 Telecom Italia S.p.A. 1.66ms from Milan, IT
178.239.42.53 AS49289 Media Veneto s.r.l. 4.39ms from Milan, IT
202.134.191.5 AS18196 Seven Star Internet Service Provider 0.83ms from Mumbai, IN
153.216.33.85 AS4713 NTT DOCOMO BUSINESS,Inc. 11.21ms from Osaka, JP
93.152.22.165 AS3257 GTT Communications Inc. 0.10ms from Paris, FR
187.210.25.5 AS8151 UNINET 3.10ms from Santiago de Queretaro, MX
144.22.146.85 AS31898 Oracle Corporation 0.16ms from Sao Paulo, BR
163.43.250.101 AS9370 SAKURA Internet Inc. 0.83ms from Tokyo, JP
199.26.72.5 AS22472 Florida Supreme Court 7.25ms from Atlanta, US
98.16.10.53 AS7029 Windstream Communications LLC 7.48ms from Atlanta, US
44.231.242.85 AS16509 Amazon.com, Inc. 0.17ms from Boardman, US
166.210.70.21 AS14080 Telmex Colombia S.A. 17.35ms from Bogotá, CO
186.132.138.101 AS22927 Telefonica de Argentina 2.18ms from Buenos Aires, AR
99.118.237.53 AS7018 AT&T Enterprises, LLC 2.43ms from Chicago, US
2.23.64.213 AS16625 Akamai Technologies, Inc. 0.42ms from Duesseldorf, DE
217.225.26.229 AS3320 Deutsche Telekom AG 4.09ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 -f5 123.51.79.17
traceroute to 123.51.79.17 (123.51.79.17): 64 hops max, 52 byte packets
5 [] 45.127.172.45 0.999 ms
6 [AS38333] 123.51.79.17 16.846 ms
Measurement taken from IPinfo ProbeNet in Sydney, AU
On

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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