Home Prefix Lookup123.51.0.0/17

123.51.0.0/17

🇦🇺

IPv4APNICallocatedAS38333SYMBIO-AS-AU-AP - Symbio NetworksNo ROA

CIDR

123.51.0.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇦🇺 Australia

City

Launceston

RIR

APNIC

Status

allocated

Allocated

11/20/2006

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
123.51.0.0/17	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	APNICRADB	6/13/2026

Covering Prefix

55 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
123.51.48.0/21	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.72.0/21	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.40.0/21	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.8.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.24.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.68.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.36.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.76.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.4.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.16.0/22	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.28.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.22.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.62.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.50.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.110.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.12.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.2.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.116.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.52.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.14.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.64.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.54.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.34.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.74.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.20.0/23	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.121.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.122.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.123.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.126.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.127.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.0.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.1.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.2.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.12.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.48.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.49.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.50.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.51.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.52.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.53.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.54.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.55.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.65.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.68.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.69.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.70.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.71.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.105.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.106.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.107.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.108.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.110.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.115.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.117.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026
123.51.120.0/24	AS38333SYMBIO-AS-AU-AP - Symbio Networks	No ROA	—	6/13/2026

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS38333	APNIC	MAINT-INABOX-AU	10/18/2021
AS45510	APNIC	MAINT-INABOX-AU	2/11/2022
AS7545	RADB	MAINT-AS2764	11/13/2023
AS24130	RADB	MAINT-AS2764	11/13/2023
AS38333	RADB	MAINT-AS38195	11/13/2023
AS45510	RADB	MAINT-AS2764	11/13/2023

More Specific Prefixes

Prefix	AS	Country	Status
123.51.64.0/18		🇦🇺AU	assigned
123.51.32.0/19		🇦🇺AU	assigned
123.51.16.0/20		🇦🇺AU	assigned
123.51.8.0/21		🇦🇺AU	assigned
123.51.4.0/22	AS38333	🇦🇺AU	assigned
123.51.2.0/23	AS38333	🇦🇺AU	assigned
123.51.0.0/24	AS38333	🇦🇺AU	assigned
123.51.1.0/24	AS38333	🇦🇺AU	assigned

Origin ASN

AS38333

SYMBIO-AS-AU-AP - Symbio Networks

Geolocation

Country🇦🇺AustraliaAU

RegionTasmania

CityLaunceston

Coordinates-41.4388, 147.1350 ↗

API

Open

GEThttps://api.ipctl.io/v1/prefix/123.51.0.0/17

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/123.51.0.0/17" | jq

External Links

RIPEstat Hurricane Electric BGP