_spf2.protonmail.ch DNS trace

Root zone

These servers manage the DNS root zone

a.root-servers.net
AS397197
AS397197
b.root-servers.net
AS394353
AS394353
c.root-servers.net
AS2149
AS2149
d.root-servers.net
AS10886
AS10886
e.root-servers.net
AS21556
AS21556
f.root-servers.net
AS3557
AS3557
g.root-servers.net
AS5927
AS5927
h.root-servers.net
AS1508
AS1508
i.root-servers.net
AS29216
AS29216
j.root-servers.net
AS396661
AS396661
k.root-servers.net
AS25152
AS25152
l.root-servers.net
AS20144
AS20144
m.root-servers.net
AS7500
AS7500
all servers delegate to

ch.

These servers manage the ch zone

a.nic.ch
AS559
AS559
b.nic.ch
AS559
AS559
d.nic.ch
AS1921
AS1921
e.nic.ch
AS42
AS42
f.nic.ch
AS8674
AS8674
all servers delegate to

protonmail.ch.

These servers manage the protonmail.ch zone

ns1.protonmail.ch
AS62371
ns2.protonmail.ch
AS62371
ns3.protonmail.ch
AS42

These servers claim authority over the protonmail.ch zone, which contains _spf2.protonmail.ch