AS21874 MMC

MMC - MMC · registered in the United States

IPv4 addresses2,3042 prefixes · <0.001% of announced IPv4

Rank in United States#5,898largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#20,892of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21874 in ASN lookup Look up an IP in this network (205.156.183.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

205.156.183.0/24
205.156.184.0/21

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AS22215#5901 BHSU - Black Hills State University2,304

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources