Home ASN LookupAS7521

AS7521 MFEED - INTERNET MULTIFEED CO.

Announced Prefixes (BGP)

9total

8 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)4,864

IPv6 Addresses

Allocated (RIR)7.9×10²⁸

Announced (BGP)7.9×10²⁸

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Allocated

Routing hygiene

Score 15/100 · Low risk

RPKI ROA coverage

100%

no RPKI invalid prefixes

IRR route objects

100%

no origin mismatches

Hijack signals

0 announced against others' ROAs, 1 own announced by others

Upstreams

diversity 0/100

Only one upstream seen in the AS paths of its routes
1 prefix of this ASN announced by another network against its ROAs

Based on 9 announced prefixes, updated daily (2026-10-24). How the score works · RPKI explained

Announced Prefixes

(BGP)9

Prefix	RPKI	IRR	Last Seen
115.69.237.0/24MOAS	Valid	Other IRR	2026-10-26
210.173.160.0/21	Valid	Other IRR	2026-10-26
210.173.168.0/24	Valid	Other IRR	2026-10-26
210.173.170.0/24	Valid	Other IRR	2026-10-26
210.173.172.0/24	Valid	Other IRR	2026-10-26
210.173.178.0/24	Valid	Other IRR	2026-10-26
210.173.180.0/22	Valid	Other IRR	2026-10-26
210.173.186.0/23	Valid	Other IRR	2026-10-26
2001:3a0::/32	Valid	Other IRR	2026-10-26

Allocated Prefixes

(RIR)1

Prefix	Country	RIR	Status
2001:3a0::/32	🇯🇵 JP	APNIC	assigned

All 9 announced prefixes of AS7521 →

Downstream Customers(2)

ASN	Name
AS25192	🇨🇿CZNIC-AS CZ.NIC, z.s.p.o.
AS200070	🇨🇿CZNIC-AS2 CZ.NIC, z.s.p.o.

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS7521 hands its own prefixes to: transit providers, or peers at an exchange.

AS55391INTERNET MULTIFEED9

Downstreams (6)

Networks whose own prefixes AS7521 passes on: usually its customers.

AS63802Nippon Telegraph And Telephone East Corporation14
AS4697Nippon Telegraph And Telephone Corporation8
AS38644INTERNET MULTIFEED2
AS131079INTERNET MULTIFEED2
AS200070CZNIC AS2 CZ.NIC, Z.S.P.O2
AS173Nippon Telegraph And Telephone Corporation1

ASPA

No ASPA0 upstreams, 2 downstreams

Listed as Upstream Provider by

2 ASNs

View full ASPA details →

External Links

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
How to run an ASPA checkVerify the upstream providers listed above
IPv4 transfer marketTransfers published by all five RIRs
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/7521

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

curl -s "https://api.ipctl.io/v1/asn/7521" | jq