1. All IP Ranges
  2. 123.0.0.0/8
  3. 123.51.0.0/16
  4. AS38333  | 123.51.20.0/23

123.51.20.0/23

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 123.51.20.0/23

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 12 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
123.51.20.212 steventull.com.au 11
123.51.20.162 bosecamp.com 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
Read more

Pingable IPs

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

IP Address ASN Details
123.51.21.57 AS38333 Symbio Networks 14.28ms from Sydney, AU
123.51.20.177 AS38333 Symbio Networks 13.77ms 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
64.135.140.23 AS11847 GoNetSpeed 3.92ms from Boston, US
96.47.47.87 AS393398 1515 ROUNDTABLE DR PROPERTY, LLC 0.28ms from Dallas, US
142.67.154.39 AS11260 EastLink 11.54ms from Fredericton, CA
116.4.140.7 AS4134 CHINANET-BACKBONE 2.45ms from Guangzhou, CN
156.240.198.23 AS399077 Tcloudnet 0.94ms from Hong Kong, HK
185.30.210.247 AS199917 ENTREPRISE DECIMA SARL 1.73ms from Lille, FR
59.102.96.55 AS7545 TPG Telecom Limited 1.97ms from Melbourne, AU
88.183.27.39 AS12322 Free SAS 10.37ms from Paris, FR
162.241.85.119 AS46606 Unified Layer 1.93ms from Salt Lake City, US
221.158.178.55 AS4766 Korea Telecom 3.33ms from Seoul, KR
172.188.51.71 AS8075 Microsoft Corporation 0.60ms from Singapore, SG
200.207.140.55 AS27699 TELEFÔNICA BRASIL S.A 6.47ms from São Paulo, BR
111.248.43.135 AS3462 Data Communication Business Group 2.26ms from Taipei, TW
42.85.239.231 AS4837 CHINA UNICOM China169 Backbone 7.89ms from Tieling, CN
182.70.55.135 AS24560 Bharti Airtel Ltd., Telemedia Services 2.65ms from Lohogaon, IN
109.149.14.55 AS2856 British Telecommunications PLC 4.01ms from London, GB
109.159.32.87 AS2856 British Telecommunications PLC 3.83ms from London, GB
209.129.10.199 AS2152 CENIC 2.20ms from Los Angeles, US
178.80.69.55 AS35819 Etihad Etisalat, a joint stock company 3.08ms from Manama, BH
87.1.123.231 AS3269 Telecom Italia S.p.A. 5.71ms from Milan, IT
156.99.5.7 AS1998 State of Minnesota 1.05ms from Minneapolis, US
136.38.169.39 AS16591 Google Fiber Inc. 0.91ms from Salt Lake City, US
78.12.100.167 AS16509 Amazon.com, Inc. 0.49ms from Santiago de Queretaro, MX
153.179.234.151 AS4713 NTT DOCOMO BUSINESS,Inc. 4.70ms from Tokyo, JP
50.116.86.55 AS19871 Network Solutions, LLC 0.34ms from Atlanta, US

Traceroute

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

$
traceroute -a -n -q1 -f5 123.51.21.237
traceroute to 123.51.21.237 (123.51.21.237): 64 hops max, 52 byte packets
5 [] 103.26.69.78 1.57 ms
6 [AS38333] 123.51.21.237 23.125 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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