Mont May

MontMay

Registry

Cluster stats

Netblocks	8 · 1,019 IPv4 addresses
All fragments	16 blocks across 2 clusters
Cluster ID	210052995
Registry	PEERINGDB
Customers	find customers using this network →

Evidence & provenance ?

Attribution	Registry record
Shared handles	clustered on 6 shared RIR contact/maintainer handles
Registry names	3 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

5 weekly snapshots · JSON

8 0 netblocks since 2026-07-05

2026-07-05 peak 8 2026-07-19

IP Ranges (8)

⬇ export CSV

CIDR	Org name	Registry	Status	Confidence
89.46.144.25/32	MONTMAY	PEERINGDB	ASSIGNED	● high
195.149.233.101/32	MONTMAY	PEERINGDB	ASSIGNED	● high
37.128.117.0/24	MontMay	RIPE	ASSIGNED PA	● low
78.11.68.0/25	MontMay	RIPE	ASSIGNED PA	● low
78.11.80.0/25	MontMay	RIPE	ASSIGNED PA	● low
81.15.239.0/24	MONTMAY-NET	RIPE	ASSIGNED PA	● low
81.15.242.0/24	MONTMAY-NET	RIPE	ASSIGNED PA	● low
2001:41b0:124::/48	MontMay	RIPE	ALLOCATED-BY-LIR	● low

Possibly related to this organisation

what's this?

Same name family

Separately-registered clusters whose names share “MontMay” — often per-country or per-system registrations of the same brand, occasionally a different organisation sharing the name. Not counted in this organisation's own footprint.

Montmay Sp. z o.o. 8 blocks

Network trust

what's this?

RPKI hygiene: B how networks compare →

87.5% of checked blocks have valid RPKI ROA coverage (7 of 8)

Possible discrepancies (4)

These blocks are registered to MontMay but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2001:41b0:124::/48 /48	authorized for AS12741 — Netia SA
81.15.239.0/24 /24	authorized for AS20804 — Exatel S.A.
37.128.117.0/24 /24	authorized for AS12741 — Netia SA
81.15.242.0/24 /24	authorized for AS20804 — Exatel S.A.

NIC Handles

AS12741-MNT AS205813 DUMY-RIPE DUMY-RIPE MNT-EXATEL NETIA-MNT