BUILDING S.R.L. — IP ranges & network footprint

IP Ranges (6)

⬇ export CSV

CIDR	Org name	Registry	Status	Confidence
116.228.29.204/30	BUILDING-CO	APNIC	ASSIGNED NON-PORTABLE	● high
116.228.42.176/29	BUILDING-CO	APNIC	ASSIGNED NON-PORTABLE	● high
116.228.243.128/30	BUILDING-CO	APNIC	ASSIGNED NON-PORTABLE	● high
193.0.201.0/24	Building LLC	RIPE	ASSIGNED PA	● high
178.254.116.216/29	BUILDING	RIPE	ASSIGNED PA	● low
2a00:2381:3fa9::/48	BUILDING	RIPE	AGGREGATED-BY-LIR	● low

IPv6 ranges (1)

CIDR
2a00:2381:3fa9::/48

Footprint over time

18 weekly snapshots · JSON

6 -1 netblocks since 2026-07-05

2026-07-05 peak 7 2026-11-01

Possibly related to this organisation

what's this?

Same name family

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

BUILDING-CONSULTANTS-UND-INNOVATORS-GMBH 11 blocks
Building Connect Pty Ltd 5 blocks
Building Support Services SRL 3 blocks
Building-Product-Design 3 blocks
BUILDING-INFRASTRUCTURE-CONSTRUCTION-MUEHLTAL-NET 2 blocks
Building Service LLC 2 blocks
BUILDING-CONSULTING-LU 2 blocks
BUILDING-SERVICES-DESIGN-47803 2 blocks

Combined view of all 48 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.

Fuxingdasha Building via TIANJIN Provincial Net of CT sub-allocation
ZHIYUNA-BUILDING via China Telecom (Group) sub-allocation
Shanghai-Building-Materials via China Unicom sub-allocation
Vmbuildingsolutionsslovensko Ba via SWAN, a.s. sub-allocation
JINHUI-BUILDING via CNCGROUP IP network of ShangHai IDC sub-allocation
ZEN20220414-NOC-WICKES-BUILDING-SUPPLIES-LIMITED via Zen Internet Ltd sub-allocation
Yunnan-KM-Yiliang-Huaqiao-Building-Co via CNCGROUP IP network of ShangHai IDC sub-allocation
Slough The Porter Building via COLT Technology Services Group Limited sub-allocation

Network trust

what's this?

RPKI hygiene: A how networks compare →

100.0% of checked blocks have valid RPKI ROA coverage (6 of 6)

Possible discrepancies (2)

These blocks are registered to Building LLC 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.

2a00:2381:3fa9::/48 /48	authorized for AS2856 — British Telecommunications Limited
193.0.201.0/24 /24	authorized for AS14576 — Hosting Solution Ltd.

NIC Handles

AS6661-MNT BTNET-MNT CXF13-AP CXF13-AP DUMY-RIPE DUMY-RIPE FL463-AP FL463-AP MAINT-CHINANET-SH NETWORK-SUPPORT-MNT ORG-BL567-RIPE XYF27-AP +1 more

Netblocks	6 · 280 IPv4 addresses
IPv6	1 prefix (largest 2a00:2381:3fa9::/48)
Registered in	China (3) · Luxembourg (1) · VG (1)
Also registered under this name	80 netblocks across 48 separate records
Record ID	259911023
Registry	APNIC
Owner jurisdiction	IT
Customers	see who runs inside this network →

Attribution	GLEIF legal-entity match
Legal identity	LEI 5299001E2OW9AOSW2215
Shared handles	clustered on 13 shared RIR contact/maintainer handles
Registry names	3 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue