  Supported by the recent detection of a TXS 0506+056 blazar neutrino with an
energy in the TeV-PeV range detected by the IceCube experiment, a probe of a
new physics scale LNP related to high-energy cosmic neutrinos is provided. At
Standard Model energies, the effect of the underlying physics LNP is first
investigated. Then, the recorded IceCube-170922A data is used to approach the
scale of such a new physics which lies under the Grand Unified Theory scale
10^25eV.
