AS399208 SL Green Realty Corp

OVA-BASE-BLDG - SL Green Realty Corp · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#17,635largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#78,559of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS399208 in ASN lookup Look up an IP in this network (65.51.129.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

65.51.129.0/24

Other ASNs named SL Green Realty Corp

5 other networks use the same organisation name; together with AS399208 they announce 1,536 IPv4 addresses.

ASNNameIPv4 addresses

AS398499OVA-HQ - SL Green Realty Corp US256

AS27457SLG-2 - SL Green Realty Corp US256

AS46152SLG - SL Green Realty Corp US256

AS399684OVA-SUMMIT - SL Green Realty Corp US256

AS400836SLG-OMA - SL Green Realty Corp US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS399198#17632 OKCCC - Oklahoma City Convention Center256

AS399205#17633 MAYSTREET-INET-01 - Maystreet256

AS399207#17634 AM-AN-ASN-01 - ACCU-MOLD LLC256

AS399212#17636 GFBMIC - GEORGIA FARM BUREAU MUTUAL INSURANCE COMPANY256

AS399213#17637 VAGARO - Vagaro256

AS399223#17638 TRUNET-INTERNET-SERVICES-LLC - TruNet Internet Services, LLC256

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