1. All IP Ranges
  2. 123.0.0.0/8
  3. 123.51.0.0/16
  4. AS38333  | 123.51.12.0/23

123.51.12.0/23

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 123.51.12.0/23

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 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
123.51.13.90 witherby.id.au 3

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

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

IP Address ASN Details
123.51.12.52 AS38333 Symbio Networks 1.39ms from Sydney, AU
123.51.13.112 AS38333 Symbio Networks 14.33ms 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
120.11.24.39 AS4837 CHINA UNICOM China169 Backbone 7.24ms from Beijing, CN
20.109.59.151 AS8075 Microsoft Corporation 0.31ms from Boydton, US
93.208.196.247 AS3320 Deutsche Telekom AG 2.70ms from Duesseldorf, DE
18.61.138.87 AS16509 Amazon.com, Inc. 1.26ms from Hyderabad, IN
172.90.14.23 AS20001 Charter Communications Inc 5.44ms from Los Angeles, US
194.116.42.167 AS34606 B.B.Bell SPA 2.45ms from Milan, IT
180.25.178.151 AS4713 NTT DOCOMO BUSINESS,Inc. 12.23ms from Osaka, JP
44.205.197.183 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
112.83.177.7 AS4837 CHINA UNICOM China169 Backbone 5.84ms from Shanghai, CN
50.112.242.215 AS16509 Amazon.com, Inc. 0.20ms from Boardman, US
135.18.114.7 AS8075 Microsoft Corporation 0.23ms from Boydton, US
71.30.17.231 AS7029 Windstream Communications LLC 15.88ms from Chicago, US
73.146.226.119 AS7922 Comcast Cable Communications, LLC 11.31ms from Chicago, US
3.149.103.119 AS16509 Amazon.com, Inc. 0.18ms from Columbus, US
95.45.71.183 AS5466 Eircom Limited 5.95ms from Dublin, IE
217.224.222.231 AS3320 Deutsche Telekom AG 2.57ms from Duesseldorf, DE
68.43.251.7 AS7922 Comcast Cable Communications, LLC 10.89ms from Flint, US
58.218.186.7 AS4134 CHINANET-BACKBONE 8.35ms from Huai'an, CN
94.175.140.55 AS5089 Virgin Media Limited 7.59ms from London, GB
172.250.69.183 AS20001 Charter Communications Inc 4.66ms from Los Angeles, US
67.187.212.23 AS7922 Comcast Cable Communications, LLC 9.27ms from Los Angeles, US
27.217.222.23 AS4837 CHINA UNICOM China169 Backbone 6.31ms from Qingdao, CN
98.80.11.135 AS14618 Amazon.com, Inc. 0.45ms from Reston, US
94.127.201.167 AS39264 "Region Svyaz Konsalt" LLC 5.67ms from Samara, RU
59.11.142.7 AS4766 Korea Telecom 1.92ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f3 123.51.12.28
traceroute to 123.51.12.28 (123.51.12.28): 64 hops max, 52 byte packets
3 [] 103.26.69.78 1.092 ms
4 [AS38333] 123.51.12.28 8.393 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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