Home Prefix Lookup168.203.36.0/23

168.203.36.0/23 - Bird.Com (AS23528)

IPv4ARINannouncedAS23528SPARKPOST - Bird.com Inc.No ROA

CIDR

168.203.36.0/23

IP Version

IPv4

Addresses

512

Mask

/23 (255.255.254.0)

Country

🇺🇸 United States

City

Seattle (Downtown Seattle)

RIR

ARIN

Status

announced

Allocated

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
168.203.36.0/23	AS23528 SPARKPOST - Bird.com Inc.	No ROA	Other IRR	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS23528	Other IRR	MAINT-AS23528	2023-11-13

Transfer History

Registry transfers of 168.203.36.0/23, blocks inside it, or blocks containing it.

168.203.32.0/19Transfer · 2022-07-18
The First Church of Christ, Scientist
🇺🇸 US ARIN
→
Sparkpost
🇺🇸 US ARIN

Date	Resource	From	To	Type
2022-07-18	168.203.32.0/19	The First Church of Christ, Scientist 🇺🇸 US ARIN	Sparkpost 🇺🇸 US ARIN	Transfer

Origin ASN

AS23528

SPARKPOST - Bird.com Inc.

Related Prefixes

More prefixes of AS23528

All prefixes of AS23528 →

Geolocation

Country🇺🇸United StatesUS

RegionWashington

CitySeattle (Downtown Seattle)

Coordinates47.6143, -122.3390 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/168.203.36.0/23

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

curl -s "https://api.ipctl.io/v1/prefix/168.203.36.0/23" | jq

External Links

RIPEstat