NET21

BGP inherited

Cluster stats

Netblocks	6 · 1,598 IPv4 addresses
Registered in	LT (2) · PK (2) · Russia (2)
All fragments	284 blocks across 272 clusters
Cluster ID	205214175
Registry	APNIC
Customers	find customers using this network →

Evidence & provenance ?

Attribution	BGP parent (inherited)
Shared handles	clustered on 34 shared RIR contact/maintainer handles
Registry names	3 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

3 weekly snapshots · JSON

6 0 netblocks since 2026-07-05

2026-07-05 peak 6 2026-07-12

IP Ranges (6)

⬇ export CSV

CIDR	Org name	Registry	Status	Confidence
5.252.184.0/24	net21	RIPE	ASSIGNED PA	● low
45.147.152.0/24	net21	RIPE	ASSIGNED PA	● low
202.125.149.232/30	NET21	APNIC	ASSIGNED NON-PORTABLE	● low
202.125.153.0/26	NET21	APNIC	ASSIGNED NON-PORTABLE	● low
217.12.240.0 – 217.12.242.255	NET21	RIPE	ASSIGNED PA	● low
217.12.252.0/24	NET21	RIPE	ASSIGNED PA	● low

Possibly related to this organisation

what's this?

Same name family

Separately-registered clusters whose names share “NET21” — 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.

NET21-REALKON 3 blocks
NET21-TRISTAR 2 blocks
NET21-GADAEV 2 blocks
NET21-124-ASINC 2 blocks
NET21-3 2 blocks
NET21-RIKPROM 2 blocks
NET21-2 1 blocks
NET21-SANWAY 1 blocks

Combined view of all 272 name-family clusters →

Sub-allocations under carriers

IP blocks an ISP reassigned to a similarly-named customer — decoded from the ISP's own naming convention, not a direct registration.

NET2176693-SMRTLC sub-allocation
Ptp via Joint Stock Company TransTeleCom sub-allocation
SERVERNET21 via Sentia Denmark A/S sub-allocation
EPCRZNET2124 via Epcan GmbH sub-allocation
SERVERNET21-2 via Sentia Denmark A/S sub-allocation
NET21-GALICINO-ASYNC sub-allocation
EUIPONET212 sub-allocation
NET21-KRAFTD sub-allocation

Network trust

what's this?

RPKI hygiene: C how networks compare →

66.7% of checked blocks have valid RPKI ROA coverage (4 of 6)

Possible discrepancies (2)

These blocks are registered to NET21 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.

5.252.184.0/24 /24	authorized for AS209043 — IPRoyal Services FZE LLC
45.147.152.0/24 /24	authorized for AS212384 — Simoresta UAB

NIC Handles

AB242-AP DUMY-RIPE DUMY-RIPE MAINT-PK-PTCLBB MH49-AP NET21-MNT mnt-lt-karolio-1 mnt-lt-karolio1-1 mnt-lt-karolio10-1 mnt-lt-karolio11-1 mnt-lt-karolio12-1 mnt-lt-karolio13-1 +22 more