Microsoft Exchange & mail servers
Autodiscover, OWA, mail, and web hostnames on one UCC certificate — the classic multi-domain mail deployment pattern.
In short: A SAN (Subject Alternative Name) SSL certificate lists multiple hostnames on one TLS credential — www.example.in, api.example.in, and shop.example.com on a single certificate with one renewal date. PrecisionTech supplies SAN SSL from GlobalSign, Sectigo, and DigiCert in DV, OV, or EV tiers with INR billing, hostname inventory review, and deployment support in Kolkata and across India. Discuss your requirements.
SAN SSL Validation Tiers — Which Level Do You Need?
The validation tier applies to the entire SAN certificate — all listed hostnames share the same assurance level. Pricing depends on SAN slot count; contact for a scoped INR quote.
DV SAN SSL
Domain control only · fastest issuance
From Contact for INR quote
- ✓ Minutes to hours per hostname
- ✓ Internal & staging multi-host
- — No org name in cert
Most common for SAN
OV SAN SSL
Organisation + all SAN domains verified
From Contact for INR quote
- ✓ 1–3 day typical validation
- ✓ B2B portals & mail servers
- ✓ Verified company name in cert
EV SAN SSL
Maximum publicly trusted vetting
From Contact for INR quote
- ✓ Rigorous multi-day vetting
- ✓ Finance & regulated checkout
- ✓ All SAN names at EV tier
What is a Multi-Domain / SAN SSL Certificate?
Subject Alternative Name (SAN) SSL certificates extend a single TLS credential to cover multiple distinct hostnames listed in the certificate's SAN extension. Instead of buying separate certificates for www.example.in, api.example.in, and payments.example.in, one SAN certificate secures all three — simplifying renewal, deployment, and inventory tracking. SAN SSL is also called multi-domain SSL or UCC (Unified Communications Certificate).
SAN SSL is available at Domain Validation, Organisation Validation, and Extended Validation tiers. It differs from Wildcard SSL, which covers unlimited first-level subdomains under one *.domain.com pattern but not unrelated domain names or deeply nested subdomains. Many enterprises combine explicit SAN entries with wildcard patterns on one certificate where CAs permit mixed SAN lists.
PrecisionTech supplies multi-domain SSL through partnerships with GlobalSign, Sectigo, and DigiCert — we help you right-size SAN counts, avoid over-buying unused slots, and plan revalidation when hostnames change mid-term.
What PrecisionTech Delivers for SAN SSL
Multi-CA SAN procurement
GlobalSign, Sectigo, DigiCert — vendor-neutral recommendation
Hostname inventory review
Map every FQDN before CSR — no coverage gaps
SAN slot right-sizing
Match product tier to actual hostname count
CSR with full SAN list
Correct common name + SAN extension format
Mid-term SAN reissue
Add or remove hostnames during certificate term
Exchange / mail hostname planning
Autodiscover, OWA, SMTP on one UCC cert
Load balancer & CDN deploy
Apache, Nginx, IIS, AWS ALB, Azure, F5
Renewal management
One renewal covers entire SAN list
SAN vs wildcard advisory
Cost and architecture comparison before purchase
SAN vs Wildcard vs Single-Name SSL
| Factor | SAN / Multi-Domain | Wildcard | Single-Name |
|---|---|---|---|
| Hostname coverage model | Explicit named list | *.domain first-level only | One FQDN |
| Unrelated domains on one cert | ✓ | — | — |
| Nested subdomains (a.b.domain) | ✓ list explicitly | One level only | One FQDN |
| Dynamic subdomain fleet | Reissue to add names | ✓ unlimited | Per cert |
| One validation / renewal | ✓ | ✓ | Per cert |
| Exchange / UCC mail use case | ✓ traditional fit | Partial | Multiple certs |
| Cost at 3–10 fixed hostnames | Economical | Sometimes overkill | Highest sprawl |
| EV tier available | ✓ | — (no EV wildcard) | ✓ |
Who Uses SAN SSL in India?
Corporate web + API estates
www, api, admin, and portal subdomains on shared load balancers — one SAN cert simplifies LB listener configuration.
Multi-brand marketing sites
Related domains (brand.in, brand.com, campaign microsites) consolidated under one OV or EV SAN credential.
E-commerce with fixed hostnames
Shop, checkout, account, and CDN origin names on a known list — SAN beats wildcard when apex and unrelated names are included.
SaaS with limited subdomain set
app, api, docs, status subdomains — SAN is cost-effective when the hostname fleet is stable and enumerable.
Certificate sprawl reduction
Enterprises replacing dozens of single-name certs with consolidated SAN products for operational efficiency.
Why Buy SAN SSL Through PrecisionTech?
| Capability | PrecisionTech | Buy direct from CA | Many single-name certs |
|---|---|---|---|
| Multi-CA comparison (GlobalSign/Sectigo/DigiCert) | ✓ | — | — |
| INR billing + GST invoice | ✓ | USD typically | Varies |
| Hostname inventory review pre-CSR | ✓ | — | — |
| SAN slot right-sizing (avoid over-buy) | ✓ | Self-serve | — |
| Mid-term SAN reissue coordination | ✓ | Self-serve | New cert per host |
| Load balancer multi-SNI deploy help | ✓ | — | Per cert |
| Code signing & PKI on same desk | ✓ | Separate portals | — |
How SAN SSL Procurement Works (Client Journey)
-
1
Discovery & SAN planning
You share your complete hostname inventory and validation tier. PrecisionTech recommends CA, SAN slot count, and sends an INR quote.
-
2
Validation & issuance
We generate the SAN CSR, coordinate domain control and organisation vetting for every name, and track status until the signed certificate is ready.
-
3
Deploy & renew
We assist with chain installation across all SAN hostnames, load balancers, and CDN origins — then calendar renewal and mid-term reissue when names change.
SAN SSL — Platforms & Standards Reference
SAN extension
UCC SSL
Multi-domain SSL
Common Name (CN)
TLS 1.2
TLS 1.3
SHA-256
CSR with SAN
X.509
PEM
Intermediate chain
Autodiscover
Exchange Server
OWA hostname
Apache mod_ssl
Nginx ssl_certificate
IIS SAN binding
AWS ALB SNI
Azure App Gateway
Cloudflare Full (Strict)
F5 SNI
SAN reissue
SAN slot count
Mixed SAN/wildcard
HSTS
OCSP stapling
PrecisionTech contact desk
Glossary
- Subject Alternative Name (SAN)
- X.509 certificate extension listing additional hostnames secured by one TLS credential beyond the common name.
- UCC SSL
- Unified Communications Certificate — legacy term for multi-domain SAN certs, common for Exchange and mail server deployments.
- Multi-domain SSL
- One certificate covering multiple distinct FQDNs listed explicitly in the SAN field.
- SAN slot
- Each hostname entry in a SAN certificate — CAs price products by included slot count.
- Common Name (CN)
- Primary hostname in the CSR — must align with at least one SAN entry on multi-domain products.
- Hostname inventory
- Complete list of FQDNs requiring HTTPS — PrecisionTech reviews before CSR to avoid gaps.
- SAN reissue
- Replacing a certificate mid-term to add, remove, or change SAN entries without waiting for renewal.
- Mixed SAN and wildcard
- Some CA products allow both explicit hostnames and *.domain.com on one certificate.
- Certificate sprawl
- Operational burden of managing many single-name certs — SAN consolidation reduces renewal overhead.
- Autodiscover hostname
- Exchange/Outlook DNS name (autodiscover.domain.com) commonly included on mail SAN certificates.
- Validation tier on SAN
- DV, OV, or EV applies to the entire certificate — all SAN hostnames share the same validation level.
Digital Trust by the Numbers
1995
PrecisionTech operating since
3+
Global CA partnerships (SSL)
350+
India city pages supported
1 cert
Many hostnames — one renewal
SAN slot counts and validation timelines vary by CA product — PrecisionTech right-sizes before you commit.
Related SSL & Digital Trust Services
Extended Validation (EV) SSL
Maximum publicly trusted assurance for regulated industries.
Wildcard SSL
Secure unlimited first-level subdomains on one certificate.
EV Code Signing
Extended Validation software publisher signing credentials.
Managed PKI & Lifecycle
Enterprise certificate discovery, renewal, and policy.
GlobalSign OV SSL
Branded GlobalSign organisation validation product page.
Sectigo OV SSL
Branded Sectigo OV SSL — cost-effective validation tier.
SAN SSL for Multi-Hostname Estates in Kolkata
PrecisionTech supports Kolkata organisations with multi-CA SAN SSL — hostname inventory review, INR billing, and deployment assistance on your stack.
Discuss Requirements in KolkataKnowledge & Related Guides
Compare Certificate Authorities
PrecisionTech is vendor-neutral — we recommend the best-fit CA for your validation tier, timeline, and platform. Branded detail pages are linked where we resell a specific SKU.
| Factor | GlobalSign | Sectigo | DigiCert |
|---|---|---|---|
| Best for | Enterprise lifecycle (Atlas), EU/global roots | Cost-effective volume, fast DV/OV | Premium EV, regulated industries |
| Validation speed | Moderate; strong OV/EV process | Typically fast DV; competitive OV | Thorough EV; enterprise vetting |
| Wildcard / SAN | Wildcard, SAN, managed PKI | Wildcard, broad SKU range | EV/OV focus; enterprise SAN |
| Code signing | EV Code Signing | OV Code Signing | EV Code Signing |
| PrecisionTech value-add | INR + GST invoice · India TZ support · validation document prep · CSR/install assistance · renewal tracking · multi-CA advice | ||
Frequently Asked Questions
1. What is a SAN SSL certificate?
A Subject Alternative Name (SAN) SSL certificate lists multiple hostnames on one TLS credential. Each name in the SAN extension — such as www.example.in, api.example.in, and mail.example.in — is encrypted under the same certificate.
2. How is SAN SSL different from Wildcard SSL?
Wildcard SSL covers unlimited first-level subdomains under *.domain.com. SAN SSL lists specific hostnames explicitly — including unrelated domains and nested subdomains — making it better when you have a fixed, known hostname set.
3. Can I mix DV, OV, and EV on one SAN certificate?
4. How many SAN names can one certificate include?
SAN slot limits vary by CA and product — common tiers include 3, 25, 100, or more names. PrecisionTech maps your hostname inventory to the most cost-effective SAN count before you purchase.
5. How much does a SAN SSL certificate cost in India?
SAN SSL pricing depends on the CA, validation tier, SAN slot count, and certificate term. PrecisionTech quotes in INR with GST invoice. Contact us for a scoped proposal comparing GlobalSign, Sectigo, and DigiCert multi-domain options.
6. Can I add hostnames after the certificate is issued?
Most CAs allow SAN reissue during the certificate term — you submit an updated CSR or reissue request. PrecisionTech handles revalidation for new names and redeploys the updated certificate chain.
7. Is SAN SSL suitable for Exchange or mail servers?
Yes. UCC/SAN certificates historically served Microsoft Exchange and remain common for mail, autodiscover, and OWA hostnames on one cert. PrecisionTech validates your autodiscover and SMTP hostname list before ordering.
8. Which Certificate Authorities supply SAN SSL through PrecisionTech?
We supply multi-domain SSL from GlobalSign, Sectigo, and DigiCert via our authorized partner relationships — see our GlobalSign, Sectigo, and DigiCert partner hubs.
9. Does PrecisionTech help install SAN SSL on load balancers?
Yes. We deploy SAN certificates on AWS ALB, Azure Application Gateway, F5, HAProxy, and origin servers behind CDNs — ensuring every SAN hostname resolves and presents the correct certificate.
10. When should I choose SAN SSL over Wildcard SSL?
Choose SAN when you have a fixed list of hostnames across one or more domains, need apex + www + API on one cert, or require nested subdomains wildcard cannot cover. Choose wildcard when you operate many dynamic first-level subdomains under one domain.
11. Can SAN SSL cover unrelated domain names?
Yes. SAN certificates can list hostnames from different registered domains (e.g. example.in and example.com) on one credential — subject to CA product rules and validation of each name.
12. What encryption standards does SAN SSL use?
Modern SAN SSL certificates use SHA-256 signatures with 2048-bit RSA keys (or ECDSA where supported), compatible with TLS 1.2 and TLS 1.3. Browser trust matches single-name SSL from the same CA.
13. Does PrecisionTech help generate a SAN CSR?
Yes. We guide CSR creation with the correct common name and complete SAN list, private key protection, and submission format expected by GlobalSign, Sectigo, or DigiCert.
14. What happens when my SAN SSL certificate expires?
Expired certificates trigger browser warnings on all listed hostnames. PrecisionTech tracks expiry dates and initiates renewal with fresh validation before production certificates lapse.
15. Can I combine wildcard and explicit SAN entries on one certificate?
Some CA products allow mixed SAN lists including
*.domain.com plus explicit hostnames. PrecisionTech confirms product compatibility during hostname inventory review.16. Is SAN SSL good for SaaS with a few fixed subdomains?
Yes. When your subdomain set is known and limited (app, api, docs, admin), SAN is often simpler and more cost-effective than wildcard — especially when you also need apex or unrelated domains on the same cert.
17. How long does SAN SSL validation take in India?
DV SAN typically completes in minutes to hours. OV SAN takes 1–3 business days. EV SAN takes several days to two weeks. PrecisionTech pre-reviews documents to reduce preventable delays.
18. How does PrecisionTech invoice SAN SSL purchases?
PrecisionTech bills in Indian Rupees with GST invoice for B2B buyers in India. We procure the underlying CA certificate on your behalf and provide deployment support as part of the engagement.
19. Why buy SAN SSL through PrecisionTech instead of directly from a CA?
PrecisionTech adds INR billing with GST, hostname inventory review before CSR, multi-CA comparison, SAN slot right-sizing, reissue coordination, chain installation assistance, and renewal tracking — reducing certificate sprawl and coverage gaps.
20. Does SAN SSL help with SEO or Google ranking?
HTTPS is a lightweight Google ranking signal. SAN enables HTTPS across multiple hostnames efficiently — the SEO benefit is encryption coverage on all listed names, not SAN versus single-name tier differences.
21. What is the difference between SAN SSL and Multi-Domain Wildcard SSL?
SAN lists explicit hostnames. Multi-Domain Wildcard SSL covers wildcard patterns across multiple base domains — a different product for organisations with several domain roots each needing subdomain coverage.
22. How do I start a SAN SSL order with PrecisionTech?
Share your complete hostname list, validation tier preference, and server platform via precisiontech.in/contact/. We return a scoped CA recommendation, SAN slot count, and INR quote, then coordinate validation, issuance, and installation through renewal.
Multi-Domain / SAN SSL Certificate — Top Metros in India
Local delivery support in India tier-1 cities, backed by PrecisionTech's worldwide digital-trust desk across 7 countries — remote procurement, validation support, and deployment assistance.