HomeASN LookupAS20057

AS20057

🇺🇸

ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC81e05477cc28a48ed3088e3408139c2a

ARINassignedASPA Published
Announced Prefixes (BGP)
1,625total
1,464 IPv4161 IPv6
IPv4 Addresses ⓘ
Allocated (RIR)327,680
Announced (BGP)7.2M
IPv6 Addresses ⓘ
Allocated (RIR)0
Announced (BGP)7.2×10^28
Prefix Limit (IPv4)
5,000
Prefix Limit (IPv6)
500
Country
🇺🇸 US
RIR
ARIN
Status
assigned
Allocated
3/20/2001

Announced Prefixes

(BGP)1,000 of 1,624
|
Prefix
RPKI
IRR
Last Seen
12.72.0.0/17
No ROA—5/12/2026
12.72.0.0/19
No ROA—5/12/2026
12.72.32.0/21
No ROA—5/12/2026
12.72.40.0/21
No ROA—5/12/2026
12.72.48.0/21
No ROA—5/12/2026
12.72.56.0/21
No ROA—5/12/2026
12.72.64.0/22
No ROA—5/12/2026
12.72.68.0/22
No ROA—5/12/2026
12.72.72.0/22
No ROA—5/12/2026
12.72.76.0/23
No ROA—5/12/2026
1–10 of 1,000
1 / 100

Allocated Prefixes

(RIR)5
Prefix
Country
RIR
Status
155.163.0.0/16🇺🇸 USARINallocated
155.166.0.0/16🇺🇸 USARINallocated
155.170.0.0/16🇺🇸 USARINallocated
166.183.0.0/16🇺🇸 USARINallocated
166.220.0.0/16🇺🇸 USARINallocated

Upstream Providers(1)

ASNName
AS7018🇺🇸ATT-INTERNET4 - AT&T Enterprises, LLC
ASPA
Published1 upstream, 0 downstreams
Authorized Upstream Providers
AS7018
Expires Jun 1, 2026
View full ASPA details →
External Links
ARIN WhoisHurricane Electric BGPRIPEstatPeeringDB
API
Open
GEThttps://api.ipctl.io/v1/asn/20057

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/20057" | jq