Data as of Nov 8, 2026

208.75.21.0/24

No anonymizer space · no proxy exits in 30 days

Synergy Broadband

Announcement

this exact prefix

No RPKI

Announced by

Type

Business

84% of it

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
208.75.16.0/21	2,048	SYNERGY-BROADBAND-CORE	Synergy Broadband (SYNER-12) · US	Direct Allocation	Feb 15, 2007	support@synergybroadband.com
└ 208.75.21.0/27	32	MI-INTAP	unknown	—	—	—
└ 208.75.21.32/29	8	MI-GEONE	unknown	—	—	—
└ 208.75.21.40/29	8	MI-NATCE	unknown	—	—	—
└ 208.75.21.50/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.51/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.52/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.53/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.56/29	8	MI-COMDO	unknown	—	—	—
└ 208.75.21.65/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.67/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.69/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.72/29	8	MI-UNITO	unknown	—	—	—
└ 208.75.21.80/29	8	MI-SAKTI	unknown	—	—	—
└ 208.75.21.88/29	8	MI-MCMCO	unknown	—	—	—
└ 208.75.21.98/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.104/30	4	NE-BLO68	unknown	—	—	—
└ 208.75.21.112/28	16	MI-MCMCO	unknown	—	—	—
└ 208.75.21.128/27	32	NE-BLO68	unknown	—	—	—
└ 208.75.21.160/27	32	MI-MCMCO	unknown	—	—	—
└ 208.75.21.200/29	8	MI-ANSYS	unknown	—	—	—
└ 208.75.21.208/29	8	MI-ONLIT	unknown	—	—	—
└ 208.75.21.216/29	8	MI-SOLGR	unknown	—	—	—
└ 208.75.21.234/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.235/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.236/32	1	NE-BLO68	unknown	—	—	—
└ 208.75.21.237/32	1	MI-HACFI	unknown	—	—	—
└ 208.75.21.240/28	16	MI-G2CON	unknown	—	—	—

The types across the prefix's announced space, by addresses.

Announced space

Announced space

256 addresses

Type	Addresses	Share	Ranges
Business	216	84%	27
Residential	40	16%	12

Origin network