aslookup.benjamin.barenblat.name

This ser­vice al­lows you to query the pre­fixes as­so­ci­ated with a given au­tonomous sys­tem. Its data come from Route­views.

End­points:

• /ip: Query pre­fixes.

  Pa­ram­e­ters:

  • as (re­quired): comma-sep­a­rated list of au­tonomous sys­tem num­bers to query
  • fam­ily (op­tional): ei­ther “4”, “6”, or “46”, in­di­cat­ing the fam­ily or fam­i­lies of ad­dresses you would like. De­faults to “4”.
  • for­mat (op­tional): ei­ther “cidr” or “name-cidr”, in­di­cat­ing the style of out­put you would like. De­faults to “cidr”, which sim­ply lists the pre­fixes; “name-cidr” in­cludes the AS num­ber and name on each line.

  Ex­am­ple: /ip?family=6&as=3,15169

Last data up­date: 2025-12-06T08:00Z