Home ASN LookupAS27357

AS27357 RACKSPACE - Rackspace Hosting

🇺🇸

ARINassigned

Announced Prefixes (BGP)

40total

39 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)118,784

Announced (BGP)266,496

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)7.9×10²⁸

Prefix Limit (IPv4)

200

Prefix Limit (IPv6)

Country

🇺🇸 US

RIR

ARIN

Status

assigned

Allocated

2003-02-20

Announced Prefixes

(BGP)40

Prefix	RPKI	IRR	Last Seen
23.253.128.0/19	No ROA	Other IRR	2026-10-11
65.61.141.0/24	No ROA	Other IRR	2026-10-11
65.61.142.0/23	No ROA	Other IRR	2026-10-11
65.61.146.0/23	No ROA	Other IRR	2026-10-11
65.61.152.0/24	No ROA	Other IRR	2026-10-11
65.61.186.0/23	No ROA	Other IRR	2026-10-11
69.20.0.0/17	No ROA	Other IRR	2026-10-11
69.20.95.0/24MOAS	No ROA	Other IRR	2026-10-11
72.4.112.0/20	No ROA	Other IRR	2026-10-11
74.205.0.0/19	No ROA	Other IRR	2026-10-11

1-10 of 40

1 / 4

Allocated Prefixes

(RIR)4

Prefix	Country	RIR	Status
69.20.0.0/17	🇺🇸 US	ARIN	allocated
72.4.112.0/20	🇺🇸 US	ARIN	allocated
146.20.0.0/16	🇺🇸 US	ARIN	allocated
207.97.192.0/18	🇺🇸 US	ARIN	allocated

All 40 announced prefixes of AS27357 →

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS27357 hands its own prefixes to: transit providers, or peers at an exchange.

AS12200Rackspace Hosting55

Downstreams (1)

Networks whose own prefixes AS27357 passes on: usually its customers.

AS396479Mailgun Technologies37

ASPA

No ASPA

External Links

ARIN Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS27357 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/27357

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

curl -s "https://api.ipctl.io/v1/asn/27357" | jq