AS396173 Southwest Airlines Co.

SWA-W11-MKT-INET - Southwest Airlines Co. · registered in the United States

IPv4 addresses7683 prefixes · <0.001% of announced IPv4

Rank in United States#9,929largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#46,072of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS396173 in ASN lookup Look up an IP in this network (66.150.1.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

66.150.1.0/24
208.184.0.0/24
208.185.44.0/24

Other ASNs named Southwest Airlines Co.

2 other networks use the same organisation name; together with AS396173 they announce 1,792 IPv4 addresses.

ASNNameIPv4 addresses

AS36488SWA-INET - Southwest Airlines Co. US768

AS29816SWA-MKT-INET-2 - Southwest Airlines Co. US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS396012#9926 COS-ASN01 - City of Scottsdale768

AS396121#9927 BAYER-BERKELEY - Bayer Corporation768

AS396145#9928 EXACTSCIENCES - Exact Sciences Corporation768

AS396202#9930 PBXI - PBXi768

AS396209#9931 AS-EP-01-PHL - Enclara Pharmacia, Inc.768

AS396281#9932 AGCOMTECH - AGILITY COMMUNICATIONS AND TECHNOLOGY SERVICES COMPANY768

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